glad to hear you got it figured out. i saw this thread and talked to a few crate guys we race with and 2 of them run stock holley 750s and 1 of them runs a stealth 650 and 1 a willys 750. these guys finish top 5 almost every night at 2 different tracks. one is a 3/8th mile and the other is a 1/2 mile. the guys running the stock holleys seem to run slightly bigger jets than the guys with the "create carbs"