Question on holley 4150

Where is your timing???? The hesitation might be your accelerator pump and squirter. My set up is close to yours also, little less convertor..650 DP w/proform center. I have the orange cam on the front pump with very slight play at the pump arm. 50cc pump on rear w/35 front squirter on street. At the track open the gap at the front pump,bigger/longer shot of fuel, and 38 front squirter 15-1600rpm on foot brake... jets 74f-82r. timing 18-20' idle 36*@ 2500
They recommend the pv 2 below idle vacuum...

Bob