Which motor are you working on, chevy or olds? The olds 350 engines made before '78 or so are totally different from chevrolet 350. Its likely that the manifolds won't interchange. The 305-307-350 engines were chevy, even if they were put in a late 70s or newer olds. Those manifolds will interchange with each other. Don't expect an Olds or Pontiac 350 to fit, though. GM went corporate in '79 and killed the Buick, Olds, Pontiac motors in favor of the SBC. frown

chip


Preaching the Hot Rod Gospel according to the 4-stroke apostles:

Suck, Squish, Fire and Fumes