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I *think* some 318 manifolds for 72-74 were also used as A-body lo-po 340 pieces starting in 1971. This same pn was also carried over to the 360 in 1974, or at least that's what it looked like. I know the port size is smaller on the 318, but I don't know what was actually happening with the...

Are those hi-po only?

:thumbsup:

If you can post them, that would be great. I did have them but I can remember what I referenced them out of. Maybe an old galen white book.

Lo-po 360 in a 73 B-body. I'd like to find a (cheap) matching set of manifolds that I can order a head pipe for.

Hello, from what I have been able to figure out, 318 exhaust manifolds got a thicker head flange casting around 73/74 so that they could also be used on a 360. Does anyone have an early and late pass car 318 manifold on hand who would be willing to take a measurement? I do not know if it would...