Re: holley tune up help
You need to change the jets, just go 2 sizes down and try that. I'm running a 302W with a 350 on it with 64's which is probably as big as you would want to go. I think I'm running a size 80 power valve which is fine. Remember if you change the power valve, the number refers to the vaccum required to open it so if you want to lean it out, use a higher number.
Onvce you get the jets sorted you will have to retune the idler jets. Open the idler screws out a couple of turns and get the car idling, then turn them in slowly. Once the engines starts running rough, give them a quarter turn out. Do this to both sides a couple of times till all happy.