Anybody use the year one hp exhaust manifolds ?

Not mine Kim. I just googled “Mopar A body big block left side exhaust manifold” and that was one of the pics.

A few years ago I dynoed a motor with what was supposedly a set of the correct ones on it........ but didn’t really remember what it looked like.

More searching turned this up....... I don’t remember the one on the dyno looking like that down around the exit........ but it may have.

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Ya thes factory A body ones are choked off pretty good. The right cam choose may help, that is if a guy can find it. Kim