A SBM stroker [email protected] does not need holes in the butterflies IMO. Replace butterflies, move the IFR to the bottom of the metering block, and get the idle screws working in the 1-1.5 turns range.
I know when we dynode with this carb it would not idle at all without the holes . I thinking I have a small vacuum leak . its time to get serious, and get the straight edge out and also look for any small cracks .
