Crazy that you asked that!!! My friend Mark Jones Vortex Pro is currently working on a set of closed chamber heads that I'm going to test on the GM performance parts 454 that I will be testing with
@@dzperformance7360 that's awesome. If we can get a recepe for a set of closed chamber heads that we can just bolt on a factory flat or dish piston short lock, a lot of budget possibilities will become reality.
@@dzperformance7360heck yea! Been curious what they would make. I got some 702s on a flat top 454 with that xe268 from comp. Runs good but never dyno’d it. Will be watching to see what they do 🍿
Man, 1970s Mark 4 four bolt main engines are as rare as hens teeth. I can't tell you how many of those I've tore down and they were all two bolt. I wonder what that was originally, like an over-the-counter engine?
I know what you mean, I buy a lot of 454s and you very rarely find a 1970s 4 bolt Main. this one I believe came out of a one ton dually truck but I've also heard that the early 1970 to 73 Corvettes almost all the 454s were four Main when used in Corvettes
The one 70s dually 454 my brother had was 2 bolt. I have not heard the 70-73 corvette 454 were 4 bolt and I doubt it, except for the one year only 71 LS6 454 in the vette. My 69 corvette with original 390 HP 427 is two bolt for what it's worth.
Wow that's interesting, lot of the stuff you're told is not always completely true ,I bet there was a 4 bolt main in a 73 454 Corvette at one time somebody found one and started that rumor. @@stevenbauer2205
A lot of questions about the 4 bolt main blocks of the 70s why did they even produce them the motors didn't make near enough horsepower to need them, and I know they existed because I've got my hands on a few of them
I can see where the 450 horse Chevelles had 4 bolt mains but not much of the others. I have one 4 bolt 454 1977 but it was a crate engine originally. I wonder if yours could have been an over the counter engine also or is it coded to the Dually.
Glad that you’re out there rescuing these things and allowing them to live up to their potential. Any closed chamber heads videos coming?
Crazy that you asked that!!! My friend Mark Jones Vortex Pro is currently working on a set of closed chamber heads that I'm going to test on the GM performance parts 454 that I will be testing with
@@dzperformance7360 that's awesome. If we can get a recepe for a set of closed chamber heads that we can just bolt on a factory flat or dish piston short lock, a lot of budget possibilities will become reality.
@@dzperformance7360heck yea! Been curious what they would make. I got some 702s on a flat top 454 with that xe268 from comp. Runs good but never dyno’d it. Will be watching to see what they do 🍿
Man, 1970s Mark 4 four bolt main engines are as rare as hens teeth. I can't tell you how many of those I've tore down and they were all two bolt. I wonder what that was originally, like an over-the-counter engine?
I know what you mean, I buy a lot of 454s and you very rarely find a 1970s 4 bolt Main. this one I believe came out of a one ton dually truck but I've also heard that the early 1970 to 73 Corvettes almost all the 454s were four Main when used in Corvettes
The one 70s dually 454 my brother had was 2 bolt. I have not heard the 70-73 corvette 454 were 4 bolt and I doubt it, except for the one year only 71 LS6 454 in the vette. My 69 corvette with original 390 HP 427 is two bolt for what it's worth.
Wow that's interesting, lot of the stuff you're told is not always completely true ,I bet there was a 4 bolt main in a 73 454 Corvette at one time somebody found one and started that rumor. @@stevenbauer2205
A lot of questions about the 4 bolt main blocks of the 70s why did they even produce them the motors didn't make near enough horsepower to need them, and I know they existed because I've got my hands on a few of them
I can see where the 450 horse Chevelles had 4 bolt mains but not much of the others. I have one 4 bolt 454 1977 but it was a crate engine originally. I wonder if yours could have been an over the counter engine also or is it coded to the Dually.
Nice score, keep the videos coming
Thanks, will do!
Good job if you need some 4.155 slugs let me know