Whats the correct CASTING number??

[72supr]

I just did the left side on a half ton 72 .3932469 part #.Don't know if this helps you or not.

[AASmedic]

Originally Posted by 72supr

I just did the left side on a half ton 72 .3932469 part #.Don't know if this helps you or not.

Unfortunately no, these are the angled ones. I need the straight dump. Thanks anyway.

[Mike C]

What is your goal? I have the reproduction Corvette 2 1/2" outlet manifolds on my Jimmy. That's the route I would go again.

I'm building a 427 for my '69 short stepper and plans are to run the re-pop big block 'vette manifolds on it as well FWIW.

[AASmedic]

Originally Posted by Mike C

What is your goal? I have the reproduction Corvette 2 1/2" outlet manifolds on my Jimmy. That's the route I would go again.

I'm building a 427 for my '69 short stepper and plans are to run the re-pop big block 'vette manifolds on it as well FWIW.

I would like to put originals back on since I have kept the truck as original as possible. Mine are cracked.

[Mike C]

The Corvette 2 1/2" manifolds look very similar to the original center dump but will allow for more power. I replaced a set of Heddman Headers and 2 1/4" exhaust with the Corvette manifolds and 2 1/2" exhaust and the "butt-ometer" suggested power was unaffected but noise was mitigated significantly (I used Walker Hemi Turbo 20" case muflers).

The 'vette manifolds are also common compared to the 2" center dumps. Speedway has them for something like $59 each. But you do have to whack the generator mount off and smooth it. Mine have been on my Jimmy since '98.