340 hesitates

Hi
Been having problems with hesitation on take off. Great at higher speed. This is a new restore 70 cuda 340 4 speed Has stock crank Eagle rods trw pistons x heads ld340 intake stock valve train. Running a purple cam 270 484 108 50 has 3.55 8 3/4 489 case Has Holley 750 carb. I have a stock electronic Dristubor stock coil stock plug wires Did not set cam to wheel. vaccumm about 7 at 900rpm everything new. What timing mark should be used.Number on the dramper > Just when i take off very doggie any idea's thanks k
Author: 1fastcuda