Quote:
Originally Posted by b-man
3” headers?
Is that the collector size because it sure can’t be the primary pipe size.
All Pontiac blocks are dimensionally the same. If both have D-port heads which is highly likely then yes of course. Pontiac heads can be interchanged onto any Pontiac block.
And please let’s not bring up the short-deck 301 and 265 blocks that 99.99999999%’of us don’t want or use.
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My 64 GTO has a 461 stroker (built from a 400 block) with Edelbrock heads. It is 3” exhaust from the headers to the tail pipes. Yes that’s the collector size. I’m just trying to figure out if I put the original 389 back in the car, will the headers on the 461 bolt up to the 389, or am I going to need to make exhaust mods.
This is my first Pontiac, so please forgive my lack of knowledge on the subject. Thanks.