Pro systems SV-1 . . Solves all the problems Holleys have . . Very simple. Two carbs, one on each end, literally, with one big hole in the middle . .
It's Magic, it very seldom needs a jet change (if ever) and it does it's job every time . . No misses . . It doesn't care about air or weather. Never seen anything as simple and works so damned good!
Buy it new, from Pro systems and let them set it up for your engine. You won't be sorry . .