i picked up a 1/2 spead bore phenolic spacer on ebay along with 2 square bore holley style spacers.
all came ok but i went to put the one spacer under my quadrajet and found that the big bores are about 3/16 too small and prevent the butterflys from opening.
did gm make 2 sizes of bores in a quadrajet?? or could this spacer be for something else. everything else lines up re bolt holes and small bores.
live and learn didnt spend a lot at least and i think i can pawn off the other spacers anyways
has anyone attempted to cut one of these spacers? as i took a carb gasket and scribed the right size oval hole and am going to attempt to cut the hole to match the gasket tomorrow with a very fine blade on my jig saw.
i tried in the past to make a spacer from wood but did not seem to have good luck with it so i found these. this cut will be easier as is only one large oval.