dre

Can anyone give me a general idea if these headers go with a 350 or 455? I wasn't able to locate a part number. The only number I was able to find was 029. I don't want to get rid of these as I am putting in a 455 and it would help save a few bucks.

dre

Can anyone please tell me if the headers above would bolt up to a 350 or a 455? They look exactly like a pair that I've seen on the board that came off of a 455.

InfoJunkie

To the best of my knowledge the headers are almost the same with the 455 having a bit longer down tubes and more of an angle at the engine flange to compensate to for the higher deck. If you still have the engine on a stand attach the headers and the starter. If the headers are 455 there should be about 1" of clearance about 3" they are 350.
This is only a rough test and it has been a long time since I've been under an Oldsmobile.

joe_padavano

Unfortunately, it's almost impossible to tell just by looking at them. As noted, the difference is in the deck height. Unless you have a set of SBO and BBO headers side-by-side, it's hard to see the differences.

dre

Thanks for the info. I actually have a set of sbo hooker headers and I put them side by side it the pictured headers don't really fit on the sbo I have.