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Unbelievable!! Send it back as fast as possible,ubortion!!

Thanks for posting this up. Sorry you got hosed by Speedmaster.

Ive bought a handfull of Speedmaster items. I had a small issue, I called and I emailed and I got bounced around to many different people in the company and never got my issue resolved. So I after that, I WILL NEVER buy from them again. Speedmaster has HORRIBLE customer service, just HORRIBLE. Ive heard that many people have issues and they get no resolution of therir problems. Its like a big f*ck you to their customers who have problems.

So you can drop the tank without removing the fuel feed nice I’m not looking forward to to buying the tool I’m cheap and my customer needs me early in the morning for a fuel pump

What a ridiculous experience. I wonder how many of their customers just bite the bullet and spend to make them work or lose out silently ... I totally agree with you that if it is sold as a set, it should work together. That's the reason to buy a set, eh? They probably sell a ton more Chevy and Ford heads and some service person was not aware of the issue if these don't happen a lot, but it's so obvious that it was screwed up from the start. Either way, machined wrong or wrong hardware or whatever, Speedmaster would have done better if they just investigated what went wrong and corrected it instead of leaving it to you. Thanks a lot for bringing this up to us, it will save one or another from this frustration 🤦‍♂️

Urban legend i have 360 77 smog heads gasket matched on a 340 work fine j and x heads are really no different

90-91% (Int. dia) Max for a Street Head. Any more porting to your Bowl Blend and your 360 iron heads are JUNK.

I know this was 10 months ago, but I had the same issue with my D 100 pick up took the Holly off and put an Edelbrock AVS two now it runs like a sewing machine no issues at all just a heads up

I was curious why you didn’t have a radiator fan on it

I hope you do another video after you get it running

So it's not going to work as it is?

I think you are just being a little too picky. 😂

Mike at b3 racing made me billet aluminum shims to solve this problem.

No oil pressure.

wow junk........

Take it to the machine shop, I think it's worth it.

Should the engine be tight to turn over by hand after fitting new pistons

It will do just fine!

Probably was cracked or warped which is why it was left for scrap in the first place. I wouldn’t spend any more time without making sure there are no cracks.

Nice find for sure. Good clean up so far on the block. Quit a transformation. Thanks for sharing. 👍

Any chance just a polish on the crank might be enough?

Got to love the 340's, I have three.

Modern engines are ubiquitously boring and have no long term survivability. I'll take an old one, you can have as much modern shit as you want!

Look at the vin # if the fifth digit is an H it is an original 340 if a 340 car it had a 8 3/4 rearend from the factory

Way to flatten a cam… Jesus….. prime the carb You can fill the float bowl through the vent tubes. OR Delete the mechanic fuel pump for an electric one. Holy cow

Sure! We can also raise the bits of the Titanic with enough money and work!!! You can buy a NEW Magnum small block (better, stronger and lighter than any "A" engine ever sold) and spend the machine-shop money on IT and top 375 HP @4400 RPM with a carb or 425 HP @5000 RPM with fuel injection. Buy a NEW FORGED billet crank and Hughes Engines rods/pistons and a REAL 600HP @ 7000 RPM is doable with 100% gasoline premium (98 Octane) pump gas. Sunoco 101 unleaded "race fuel", you can up the compression ratio to make 750 HP @7000 RPM. I've seen one on a Prony dyno (water) pull that for 32 minutes. Lots of power and torque from a 361 CID! BTW, an "old" "A" engine WILL NOT go that BIG-you'll hit water!

It deserves every penny to clean,bore, and modify.

Hello, is this the local machine shop to which I'm calling? Great, I have a 1968 340 block that needs an inspection decking, aligne honing and boring. I want it done properly the first time so it will last a long time. No just a stock build, yes new pistons and cam. I'll bring the engine in tomorrow morning

Years ago i bought a set of their Victor BBM heads. I bought them bare, i also bought their offset rocker system that those heads used. The heads was nice, very nice, but the rocker set up was complete junk. This is procomp with a different name. They sell 98% junk. I really wish people would quit buying this junk. People by this shit because its cheap, not good. Nobody does any kind of product reviews or company reviews. They see cheap prices and jump on it. Be greatfull they didn't work. Their valve train is complete junk. Stop buying this shit. They can't make a set of valve covers without screwing them up.

Thanks for posting this video, now I know.

If you want to be more disappointed check out the port match of the intake to the head. The intake is way off.

First engine build ? Ten minutes to get it started, leaks all over, surprised it gets hot sitting there at 2,000 plus rpm? Definitely your first build, keep at it, you'll get it eventually. 🤣

100 times better than Edeljunk heads

Thank you for posting.

Thank you for your sacrifice. I was considering those heads but couldn't find any comments on them. Sorry for your troubles

Have you tried them out yet

Looks like a junk shop. You need a new starter. The one you're using is dragging

Oh yeah all the motor's please and thanks I have a 360 in my 83 Ram 150 but I love me a 440 ! God bless from Canada eh

You have to love the sound of that cranking!!

nice video - just rebuilding my 360 - heads got 2.02 inlets n mopar roller rockers but not sure what else as springs too strong for my old valve spring compressor so they now at machine shop to get out! will be giving it a light porting similar to yours if not done already. I got the old dished pistons :( - trying to keep it cheap - wot blue did you use as want to get similar although am uk based!

Yeah i used a set of these once i bought bare heads i used conical springs and small diameter retainers with a custom length valve. this was the fix in my case . Was it worth the grief hassles and expense No. The Heads themselves are just poorly manufactured in so many aspects If you need a high port head buy Eds from Hughes and use their rockers

There is no gain in flow reducing that spot down

Intake port on smog heads are exactly the same as J heads identical and the X head except for the 2.020 valve on the X head

NEEDTO CC EVERY COMBUSTION CHAMBER YOU CANT JUST PORT AND THINK THE CC ARE GOING TO BE THE SAME AIR FLOW IS ALL DIFFERENT NOW ENGINE WILL NOT PERFORM WELL NO GUESS WORK MAN

Nice video. Should you leave a small gap between counter and tile for expansion? Or is right on top the countertop ok?

Speedmaster and legitimate bad press…saw where they copied another innovators valve body, and were selling them on Summitt… Now problems with their budget BB Mopar heads… I have a set of the heads. They would not work with my application a 400 low deck w/girdle stroked to 517. One issue was going with a solid lifter roller cam and stronger springs being required and cutting the spring pockets. The Speedmaster roller rockers had similar fitment issues to yours. Clearancing as described ascper ‘Stan the Man’ at Speedmaster was really not an option. Some Comps roller rockers did work. Next issue was gaining 3/8ths pushrod clearancing, broke through into one of the ports. Now I have read online about drilling a 9/16 enlargement, and installing 17/32 copper/brass tubing as a sleeve after coating it with epoxy, as this will intrude into the ports. At this point looking at other head options.

Ya speedmaster makes junk. It’s cheap Chinese stuff. I’ve used it but it’s a lot of work to fix things. If you don’t have a machine shop don’t buy their stuff.

Wow that sucks! 😕 So you ordered, bought a set of 1.6 rockers to work with your heads and they forgot to tell you those rockers wouldn't work with the valve heights, springs and retainers .😮 Thanks for the update on that company, won't be ordering anything from them 😕.

Hey man. How's this thing run now with the cnc heads?

Great work here!