Made a few passes with the 434 small block last week

what size carb are you running , what is your timing and your front jets ?
I seem fat out of the hole and lean at top with my 650, and going to a 750 next week .
almost seems like my idlers are hitting to hard at launch and I"m getting hesitation .
after that its a solid pull ,but a hair lean m1 intake 360 +.030 no time slips yet