I know it's going to take some playing with to get just right but I can't even find anything to give me an idea of what till get me close for jet size and power valves on my Holley 390 carb. It's a 1971 Chevy 250 with a Holley 390 on a Clifford intake, headers and full exhaust engine itself is still stock. I would reall appreciate something that will just get me in the park or has worked for other guys.
Thanks
