From FordCobraOne below: "3927188 - 75cc 1.72intake 1.50exhaust - 1969-70 307/327 heads. I had a guy try to sell me these and had an elder verify that the "baby camel humps were junk heads".... (This was back in the 80s when I was a teenager)" Yes, look like lopo truck engine heads...
They are 186 heads,used from 69 to 73 .used on 300 hp and up small blocks,ones over 300 hp 325 /350/360/370 hp had 202/160 valves with screw in studs and guide plates.275/290/300 hp engines had 194/150 valves and press in studs
Those heads were popular in the 60s through mid 90s AS WE ALL KNOW LOL / till we were able to buy aftermarket performance heads. Small block race engines were destroying those castings from birth. GM sold Reman & new castings in the good wrench-with the known target master motors as an hd replacement program. Some of the casting numbers not listed in the searches are from factory replacement casting numbers through Canada & Mexico. This was the precursor to the millions of last gen vortec sbc that were casted on Mexican plants. I remember a company called Arrow head ( also Dk’s in the 80s who sold out to Arrow ) had 291-462 castings in a various forms. It was an ad in Hemings / hot rod and car craft magazine / Midwest automotive ( now summit ) P. A. W ( the original crate Engine but un assembled ) & motortrend to name a few. I got a set with different casting numbers and they explained what I am right now. They were better versions. The factory intake runners ranged from 159-168 cc & the exhaust runner from 52-58 cc. The reman or replacement head was a solid 175-178 cc runner intake & 65-68 cc exhaust. They usually has been drilled for screw in studs. Cast iron faded off into the sunset for a long time when the aluminum head era came. They stopped producing them in the late 80s. They had a lot of them in stock from lack of popularity when gm released the famous ZZ4 aluminum head engine we all know. Then the center bolts aluminum heads were available from gm performance ….. the rest is history. NOTE - Grumpy Jenkins alone used up enough of those castings on test engines finding power - not to mention the amount trashed in racing
Those are 186's. Sometimes casting slag gets in the digits. From around '69 and up they had accessory holes. I've had at least 1 set of all of them. 461, 462, 186, 291, 492..and even 041. 041 doesn't have the camellback insignia (its a wedge insignia), but the chambers/ports are the same as camelback. The 492's come with screw in studs and guide plates from the factory. These are the LT1's They were all 2.02 if I'm not mistaken. But yah, those you have are modded 186's.
I had a pair of camel hump heads ( from t salvage yàrd) on my 69 camaro, and I had to do work on those. But t ones I got, even fresh out of t junk-yard, looked a lot better than those. Save your money and keep looking. Or better yet, buy t real thing from your chevy dealer. Parts,valves, springs,etc. Are still available!
I believe they are corvette heads. I rebuilt a 307 for my 70 Chevy pickup back in 1980 with camel back heads. Crane cam ,flat top pistons, intake, holley carburetor , headers . Three inch exhaust into glass pack mufflers. I ran that truck for 12 years. It was a great combination. It was a smooth rev happy motor. I enjoyed driving it every day.
Was your 307 .060 over? I ask because I owned a 70 chevy half ton long bed in the early to mid 90's that had a .060 over 307 with double hump heads on it...
I yanked a pair of 487X castings with 76CC from a 1971 Impala wagon that was all original. These heads were supposedly only on 71-72 Corvettes with the LT-1 option. I think whatever was available was just installed to get the vehicle assembled?
dude you have 186 64cc accesory bolt holes 1968-1970 302,350 most likely. those heads dont look like much is left to work with. them heads are highly sought after they came with both 1.94 or 2.02 intake and 1.50 or 1.60 exhaust peace out
2 different versions of these heads. 186 casting are gm used in 69 70 lt1 engines. 492 was the exact same head sold over the counter through gm performance.
Hey Jeff I have a set of even more stranger heads angle plug 202 with the biggest ports I ever seen in a camel head someone told me my heads looked like they were ported for blower motor is there any truth to this that you know of
oh ya np at all, it is kinda of fun once in awhile getting on here and shooting the chit with people about cars and engines and all that stuff even if it is just me talking in the video! and like I said I hope it helps educate others the more we talk about this stuff
Any 202 heads are desirable and worth saving. You can tell they are early from the plugs they run. By the time you get them built you are about the same cost as a brand new bargain aluminum pair these days.
The last three numbers are 186 we ran a set of double heads like that for years with the accessory holes in them 64cc camber they may be strange to you but they’re not strange to me we have seen them for years… The casting number 041 they are double hump heads as well with accessory holes in them to many they may be strange but we have seen them many many times for years.
3927188 - 75cc 1.72intake 1.50exhaust - 1969-70 307/327 heads. I had a guy try to sell me these and had an elder verify that the "baby camel humps were junk heads".... (This was back in the 80s when I was a teenager)
Those are 186 heads and 1969 and later. They were production and over the counter replacement heads and are 64 CC. In 1969 the alternator was moved and the bolt holes on the head were for the alternator brackets. Pre '69 had no bolt holes and alternator was mounted off exhaust manifold and water pump....
ya at the time of me doing the video it was hard to make out the numbers on the head i mean i got a book for this stuff to decode more numbers but sometimes its hard to tell the physical difference as well or certain characteristics even
I worked in an automotive machine shop for 2 decades from 76 to the mid 90s. In those years we seen a lot of undocumented versions of small block cylinder heads. They look to me like LT1 or 302 heads. They look like 13/16 plugs and they are definitely 64cc chambers. They are currently fitted with what looks like 2.02 intake valves, whether they came this way from the factory is anyone's guess. GM also sold over the counter heads in that era also so it's possible they were not on a production engine. Possible, but not very likely.
My best guess would be the same as you- leaning more toward the 3927186 '69-70 302/350 64cc Camel hump Could be the 3927188 '69 327 / '70 307 74cc chambers too.... possibly There is ZERO 382 prefix casting #s in any of my cheat sheets. Jumps 381 to 383 every time. Lists only one 382 prefix for a 366ci BBC Truck Block... kinda strange !?!
ya sometimes casting numbers are hard to read for sure but after thinking about it and Terry mentioned it I'm pretty sure they are 186's it would make the most logical sense
Round ports are old ways of thinking about ports. The roof of the exhause flows most of the air coming from the cylinder. To make them round can actually cause them to flow less, especially if someone made port floor bigger due to the fact that the curve on the floor from the seat to the header is sharper and at higher rpm, air is not moving fast. You may want to investigate using the raised pushrod guide plates on a small block Chevy. From what info I have gathered from Comp and a couple other manufacturers, the flat one are better.
The first picture you showed of those heads looked like the combustion chamber looked like heart shaped combustion chambers if I remember correctly they were a 55cc chambered head a old and rare set heads the accessory bolt holes were probably drilled
There are 10 different numbers for this head depending on the specific changes to the casting.straight gasket head,angle plug ,straight plug taper seat.hardened seat
Those look like 882's. They do not have the same performance qualities that worked camel humps are known for. Although for the money and being modded are the correct price and shall perform well for a factory casting up to O.44O" lift they are o.k.. The 882 head are only second to camel humps and camel humps are only second to Vortec heads. The reputation for 'camel hump' heads came from what could be done with them by David Vizard himself. A peice of iconic history branded into legendary racing forever. Be sure to check those for cracks by magnafluxing, then use them. They shall be a great factory head for the money for sure. Just sonic check to make sure they are not too close to water, and magnaflux to check for cracks. Until you can get some dart iron eagle heads or brodix track 1 series. What i like about brodix, is they are the united states economy and family citizen U.S. business.
If they have the M cast mark you cannot go by American details as the McKinnon foundry ones were versions with the same casting numbers but not identical as mostly were truck heavy wall spec so little things were different to US castings, they dod not do light weight car castings as the truck production was the bulk of it so the local Canadian cars got truck spec mostly and the engine production codes were shared too but specs not the same for complete assemblies etc
So in the Camel Hump (aka double hump or double bump) sbc cylinder head world, casting numbers 186, 187 and 492 all have accessory bolt holes with 492s being the holy grail of the bunch. 291, 461 (aka fuelie heads), 461X and 462 have no accessory bolt holes with the 461X heads being the holy grail of the bunch. The planets aligned and I was fortunate enough to stumble upon a set of 461 heads, a set of screw-in studded 462 heads, a set of Power Pack (pre Camel Hump era) heads, and a 327/Muncie combo for $1700. This stuff is still out there.
looks like 186 heads i would clean the last number bettter or look on the heads where the rocker arms and you should see 186 or on the underside of the head next to the intake runner look up old style cylinder head identification numbers i had the same heads they were from a 1969 350 !!!
Those cylinder heads are rare DZ 302 SBC heads. They're not considered camel humps heads. If you research look under Chevy DZ 302 cylinder heads you'll find out everything about them.
Not all camel hump heads of 64 cc you have your 74 cc heads with your small camel hump your large camel hump are your 64 cc I just bought a set for $200 complete 461’s
These poor castings have been made love to many times. Screw-in studs but didn't drill the original pushrod holes for clearance. The sloppy Bridgeport work on the exhaust ports is comical. The 2.02 intake seats are sunken so far they wouldn't flow as well as 1.94 heads. If you paid more than $6.00 a ton for these, you deserve to learn this cruel lesson. 2 random humps on late model small block heads don't mean $hit.
Hey Terry Good Call!! I'm pretty sure that is what they are too, one of these days I should Try and find all Double Hump Head Casting and make a Solid Video on all the Differences!
Ya I know Vortecs are the best for later Gen Motors! I did a little bit on that with the Video of the 350 Vortec! but ya you are right about those Heads they are pretty rough!! I don't think they are any good anymore except for scrap metal I mean I wouldnt be surprised if they were not cracked they look more damaged than what they are!
These are bad ass heads rebuild them and enjoy them if you dont want them i take donations 😂 🤷 🤙 i have a set of 041x heads and still kick todays technology in the ass 💪
oh ya I'm sure they are cheaper but the thing is I'm Canadian so whatever those cost down in the States by the time they get to my doorstep in looking at double the price, but the reality is you probably wouldn't be too far off from a new set of heads I couldn't image how much machine work cost around here these days. but ya good call for sure
882 Heads on a flat top 350 with a 350 trans with a 11 in stall with a 373 gear runs very good on the street.If you run the engine hot , that head will crack.Crack. 882 heads came on 400 sb's.Maybe others but the ones I found had the steam holes.
186 I bet
Yup for sure I'm pretty sure that is what they are now!
Would you won’t to sale them?
From FordCobraOne below: "3927188 - 75cc 1.72intake 1.50exhaust - 1969-70 307/327 heads. I had a guy try to sell me these and had an elder verify that the "baby camel humps were junk heads".... (This was back in the 80s when I was a teenager)"
Yes, look like lopo truck engine heads...
They are good and have bolt holes for accessories
That last number is a 6 making them 186 casting heads. They were available with 194/158 valves or 202/160valves
For sure man at the time of making this video it was kinda hard to tell at first i was trying to decode as much as i could but ya
I have a set with what looks like the same exhaust ports as yours that's amazing
They are 186 heads,used from 69 to 73 .used on 300 hp and up small blocks,ones over 300 hp 325 /350/360/370 hp had 202/160 valves with screw in studs and guide plates.275/290/300 hp engines had 194/150 valves and press in studs
The 186 casting heads were used on the DZ 302. 290 hp
Those heads were popular in the 60s through mid 90s AS WE ALL KNOW LOL / till we were able to buy aftermarket performance heads. Small block race engines were destroying those castings from birth. GM sold Reman & new castings in the good wrench-with the known target master motors as an hd replacement program. Some of the casting numbers not listed in the searches are from factory replacement casting numbers through Canada & Mexico. This was the precursor to the millions of last gen vortec sbc that were casted on Mexican plants. I remember a company called Arrow head ( also Dk’s in the 80s who sold out to Arrow ) had 291-462 castings in a various forms. It was an ad in Hemings / hot rod and car craft magazine / Midwest automotive ( now summit ) P. A. W ( the original crate Engine but un assembled ) & motortrend to name a few. I got a set with different casting numbers and they explained what I am right now. They were better versions. The factory intake runners ranged from 159-168 cc & the exhaust runner from 52-58 cc. The reman or replacement head was a solid 175-178 cc runner intake & 65-68 cc exhaust. They usually has been drilled for screw in studs. Cast iron faded off into the sunset for a long time when the aluminum head era came. They stopped producing them in the late 80s. They had a lot of them in stock from lack of popularity when gm released the famous ZZ4 aluminum head engine we all know. Then the center bolts aluminum heads were available from gm performance ….. the rest is history. NOTE - Grumpy Jenkins alone used up enough of those castings on test engines finding power - not to mention the amount trashed in racing
good comment i appreciate the info!
I've got the same set of heads they're 186s 64 CC 202's 160 valve you get your hands on a set of these heads don't let them go
Those are 186's. Sometimes casting slag gets in the digits. From around '69 and up they had accessory holes. I've had at least 1 set of all of them. 461, 462, 186, 291, 492..and even 041. 041 doesn't have the camellback insignia (its a wedge insignia), but the chambers/ports are the same as camelback. The 492's come with screw in studs and guide plates from the factory. These are the LT1's They were all 2.02 if I'm not mistaken. But yah, those you have are modded 186's.
I had those on a 1970 impala
I had a pair of camel hump heads ( from t salvage yàrd) on my 69 camaro, and I had to do work on those. But t ones I got, even fresh out of t junk-yard, looked a lot better than those. Save your money and keep looking. Or better yet, buy t real thing from your chevy dealer. Parts,valves, springs,etc. Are still available!
I believe they are corvette heads.
I rebuilt a 307 for my 70 Chevy pickup back in 1980 with camel back heads.
Crane cam ,flat top pistons, intake, holley carburetor , headers . Three inch exhaust into glass pack mufflers.
I ran that truck for 12 years. It was a great combination.
It was a smooth rev happy motor.
I enjoyed driving it every day.
Was your 307 .060 over? I ask because I owned a 70 chevy half ton long bed in the early to mid 90's that had a .060 over 307 with double hump heads on it...
I yanked a pair of 487X castings with 76CC from a 1971 Impala wagon that was all original. These heads were supposedly only on 71-72 Corvettes with the LT-1 option. I think whatever was available was just installed to get the vehicle assembled?
Ya i wouldn't be surprised about that i think back than sometimes some engines depending on a Monday or a Friday got whatever heads lol
dude you have 186 64cc accesory bolt holes 1968-1970 302,350 most likely. those heads dont look like much is left to work with. them heads are highly sought after they came with both 1.94 or 2.02 intake and 1.50 or 1.60 exhaust peace out
2 different versions of these heads. 186 casting are gm used in 69 70 lt1 engines. 492 was the exact same head sold over the counter through gm performance.
Hey Jeff I have a set of even more stranger heads angle plug 202 with the biggest ports I ever seen in a camel head someone told me my heads looked like they were ported for blower motor is there any truth to this that you know of
Cool, great info on the heads.
Ya sometimes I ramble on about this stuff but in all honesty it could be helpful to others especially a Younger Generation!
Nice video Jason. Thanks for the info 👍
oh ya np at all, it is kinda of fun once in awhile getting on here and shooting the chit with people about cars and engines and all that stuff even if it is just me talking in the video! and like I said I hope it helps educate others the more we talk about this stuff
Any 202 heads are desirable and worth saving. You can tell they are early from the plugs they run. By the time you get them built you are about the same cost as a brand new bargain aluminum pair these days.
Ya pretty much sadly to say somethings have come down in price all depends on what you wanna do
The last three numbers are 186 we ran a set of double heads like that for years with the accessory holes in them 64cc camber they may be strange to you but they’re not strange to me we have seen them for years… The casting number 041 they are double hump heads as well with accessory holes in them to many they may be strange but we have seen them many many times for years.
They're 186's good old-school head
3927188 - 75cc 1.72intake 1.50exhaust - 1969-70 307/327 heads. I had a guy try to sell me these and had an elder verify that the "baby camel humps were junk heads".... (This was back in the 80s when I was a teenager)
Had a set of angle plug 202's from an older 1967 corvette on my Chevy Monza small block.
Ya those are nice heads man!
I have a set of 3927186 heads, with accessorie holes. Date stamp is March 6 of 69'
Right on I just thought I would do these Videos just for anyone that does not know or new to the hobby
Those are 186 heads and 1969 and later. They were production and over the counter replacement heads and are 64 CC. In 1969 the alternator was moved and the bolt holes on the head were for the alternator brackets. Pre '69 had no bolt holes and alternator was mounted off exhaust manifold and water pump....
ya at the time of me doing the video it was hard to make out the numbers on the head i mean i got a book for this stuff to decode more numbers but sometimes its hard to tell the physical difference as well or certain characteristics even
Last 3 numbers is what I always went by
ya fair enough
I worked in an automotive machine shop for 2 decades from 76 to the mid 90s. In those years we seen a lot of undocumented versions of small block cylinder heads. They look to me like LT1 or 302 heads. They look like 13/16 plugs and they are definitely 64cc chambers. They are currently fitted with what looks like 2.02 intake valves, whether they came this way from the factory is anyone's guess. GM also sold over the counter heads in that era also so it's possible they were not on a production engine. Possible, but not very likely.
They are 307 heads, accessory holes have been drilled, most popular on 2 barrel Malibu.
My best guess would be the same as you- leaning more toward the 3927186 '69-70 302/350 64cc Camel hump
Could be the 3927188 '69 327 / '70 307 74cc chambers too.... possibly
There is ZERO 382 prefix casting #s in any of my cheat sheets. Jumps 381 to 383 every time. Lists only one 382 prefix for a 366ci BBC Truck Block... kinda strange !?!
ya sometimes casting numbers are hard to read for sure but after thinking about it and Terry mentioned it I'm pretty sure they are 186's it would make the most logical sense
Round ports are old ways of thinking about ports. The roof of the exhause flows most of the air coming from the cylinder. To make them round can actually cause them to flow less, especially if someone made port floor bigger due to the fact that the curve on the floor from the seat to the header is sharper and at higher rpm, air is not moving fast. You may want to investigate using the raised pushrod guide plates on a small block Chevy. From what info I have gathered from Comp and a couple other manufacturers, the flat one are better.
They were used on z/28 302 Camaros in 1969. Had some back in the late 70s.
The first picture you showed of those heads looked like the combustion chamber looked like heart shaped combustion chambers if I remember correctly they were a 55cc chambered head a old and rare set heads the accessory bolt holes were probably drilled
Ya they did look heart-shaped these heads did have me confused for a bit
I have a set of them on my 78 camaro.mine I installed stainless steel vavles.thay do good
Ya they are pretty decent heads when they are all done up good i will say that
1827186 those are what are called 186 heads which came with 64cc combustion chambers 202in 160ex or 194in 150ex !
That's so you can identify the combustion chamber if you noticed it has a unique shape
ya fair enough
There are 10 different numbers for this head depending on the specific changes to the casting.straight gasket head,angle plug ,straight plug taper seat.hardened seat
I have a reman 350 from gm that was bought in the early 2000's with the same heads
right on man!
Those look like 882's. They do not have the same performance qualities that worked camel humps are known for. Although for the money and being modded are the correct price and shall perform well for a factory casting up to O.44O" lift they are o.k.. The 882 head are only second to camel humps and camel humps are only second to Vortec heads. The reputation for 'camel hump' heads came from what could be done with them by David Vizard himself. A peice of iconic history branded into legendary racing forever. Be sure to check those for cracks by magnafluxing, then use them. They shall be a great factory head for the money for sure. Just sonic check to make sure they are not too close to water, and magnaflux to check for cracks. Until you can get some dart iron eagle heads or brodix track 1 series. What i like about brodix, is they are the united states economy and family citizen U.S. business.
ya thats true brodix heads as well and good advice thanks
If they have the M cast mark you cannot go by American details as the McKinnon foundry ones were versions with the same casting numbers but not identical as mostly were truck heavy wall spec so little things were different to US castings, they dod not do light weight car castings as the truck production was the bulk of it so the local Canadian cars got truck spec mostly and the engine production codes were shared too but specs not the same for complete assemblies etc
So in the Camel Hump (aka double hump or double bump) sbc cylinder head world, casting numbers 186, 187 and 492 all have accessory bolt holes with 492s being the holy grail of the bunch.
291, 461 (aka fuelie heads), 461X and 462 have no accessory bolt holes with the 461X heads being the holy grail of the bunch. The planets aligned and I was fortunate enough to stumble upon a set of 461 heads, a set of screw-in studded 462 heads, a set of Power Pack (pre Camel Hump era) heads, and a 327/Muncie combo for $1700. This stuff is still out there.
Probably a 186 head and they are great heads if so.
Those look like crane fireball heads by looking at exhaust ports
looks like 186 heads i would clean the last number bettter or look on the heads where the rocker arms and you should see 186 or on the underside of the head next to the intake runner look up old style cylinder head identification numbers i had the same heads they were from a 1969 350 !!!
082 with the Cadillac head
They called him a late-model double hump s the accessory bone hose came off of two years only lt1350 375 hp
Good anchors for your boat.
oh come on Joe they are the best Flowing SB heads around man ;) lol
@@Canadiancarguy1987 Looks like they were in the water a long time.
@@joe-hp4nk ya i know they do eh!
@@Canadiancarguy1987 Take off eh.
I have a set of 291s now 👍
Oh ya? right on are they the Strait plug or angle plug?
@@Canadiancarguy1987 straight
Those cylinder heads are rare DZ 302 SBC heads. They're not considered camel humps heads. If you research look under Chevy DZ 302 cylinder heads you'll find out everything about them.
Crane Fireball heads!
I had them on my truck they are good heading got over 400 horses out of them
Not all camel hump heads of 64 cc you have your 74 cc heads with your small camel hump your large camel hump are your 64 cc I just bought a set for $200 complete 461’s
ya that could be also i just usually go by what the book says but you know the book does not cover everything either
These poor castings have been made love to many times. Screw-in studs but didn't drill the original pushrod holes for clearance. The sloppy Bridgeport work on the exhaust ports is comical. The 2.02 intake seats are sunken so far they wouldn't flow as well as 1.94 heads. If you paid more than $6.00 a ton for these, you deserve to learn this cruel lesson. 2 random humps on late model small block heads don't mean $hit.
I have 186 on my firebird GTA
I had some of those, but last number was a 6, not a 8
186
Hey Terry Good Call!! I'm pretty sure that is what they are too, one of these days I should Try and find all Double Hump Head Casting and make a Solid Video on all the Differences!
@@Canadiancarguy1987 that would be awesome
I have a set of them, and I truly believe they are from Canada and they will not be an our books.
Find a set of 96-99 Vortec that are not cracked. The first pair looks like the boat is out of the water for the winter so they don't need anchors.
Ya I know Vortecs are the best for later Gen Motors! I did a little bit on that with the Video of the 350 Vortec! but ya you are right about those Heads they are pretty rough!! I don't think they are any good anymore except for scrap metal I mean I wouldnt be surprised if they were not cracked they look more damaged than what they are!
@@Canadiancarguy1987 Bolt on any small block.
@@noccis3448 for sure!!!
Ya best set of heads iv ran with just a little port work
@@Canadiancarguy1987 you'd be suprized what we can save
Looks like 186 041 is the same
There not strange. Most of the 68-69 motors had these. Even DZ 302
They 186 heads
I have a set these heads they're of a 70 Camaro LT1
65-70 Cadillac
186 heads
These are bad ass heads rebuild them and enjoy them if you dont want them i take donations 😂 🤷 🤙 i have a set of 041x heads and still kick todays technology in the ass 💪
Fuelie heads
It's a 186 heads
Hmmmmm.....
Totally a 186 head
ya for sure it was hard to tell at the time of doing this video
Those are 186
186 I have a set
THE NEW ALUMINUM EDELBROCK HEADS ARE CHEAPER THAN BUILDING THESE AND BETTER.
oh ya I'm sure they are cheaper but the thing is I'm Canadian so whatever those cost down in the States by the time they get to my doorstep in looking at double the price, but the reality is you probably wouldn't be too far off from a new set of heads I couldn't image how much machine work cost around here these days. but ya good call for sure
186 man
There newer set..
882 Heads on a flat top 350 with a 350 trans with a 11 in stall with a 373 gear runs very good on the street.If you run the engine hot , that head will crack.Crack. 882 heads came on 400 sb's.Maybe others but the ones I found had the steam holes.