Need tuning help on 340

all carbs have jets and mixture screws and a vacuum based enrichment etc. NHRA super stock cars run 9 sec. 1/4 times with Carters and Holleys and Rochesters and Autolites. what is your vacuum at idle? hang with it, quality takes time

Yeah, I'm pretty committed to getting this carb right. I think people like Holleys because they get tinkered with till they make power. Edelbrocks usually get bolted on and run with little more than a rod change. Or so it seems to me.

I had the vacuum up to a good 14" at one point. More like 13 now. And thanks for the encouragement. I'll get it eventually.