Re: OMC Exhaust manifolds
If you want to use the OE OMC one piece manifold/riser, only they made them. If you want to go aftermarket, you have to use Volvo style center riser manifolds, and you'd have to find out how to connect the risers to the Y-pipe using rubber exhaust hose. I just got a set of OE manifolds for my 88 4.3, $377 a side, but at least I know they fit and I don't have to fiddle around with it to get it to all line up!!