Mopar heads
 

This pertains to IHRA Stock calss. Can I run the '67 915 heads on my '64 426 street wedge (365hp) or am I restricted to the original 516 head?

Looking at the figures it seems the car will fall into G/SA but not sure. The car is a '64 Plymouth Savoy 2dr sedan and I believe the engine has been factored down.

Any help would be appreciated.

Jim

Re: Mopar heads
 

I don't know about IHRA but they are legal in NHRA with a 1.60 exhaust valve. Shawn

Re: Mopar heads
 

Thanks Shawn,

I thought they were legal but wasn't sure.

Jim

Re: Mopar heads
 

The problem is that they come with a 1.74 exhaust, can I put new seats in them so I can use the smaller 1.60's?

Re: Mopar heads
 

Yes

Re: Mopar heads
 

That's correct! .......Shawn

Re: Mopar heads
 

Original 915 heads with 1.60 exaust are easier to find and cheaper than the 1.74 versions. I found info on the NHRA spec sheets that allow the 915 heads on 65 and 66 cars but I can't find it for anything earlier. It would be nice if you could use them on the 62 361/305, the intake port is identical to the 906 head which is light years ahead of the 516, Paul.

Re: Mopar heads
 

Paul,

there are several early engine combo's that could benefit with the 915's, 62 383 motors, 62 413's (less max wedge), 63 & 64 383's, and I believe it would make the 64 426s motor competitive.....516's are not viable, too restrictive.

Re: Mopar heads
 

I have a question, what head dose a stage 3 run now ? 518 heads were hard to find in the 70s. Now I would think they are gold ! Is there a mopar replacement acceptable now?

Re: Mopar heads
 

The originals are like gold, lol! Mopar does make an acceptable replacement though.