Carb issue?

Hey guys and gals, I recently got my 65 Fury II 4 door up and running and I've been screwing around with the Stromberg WW 2 BBl set on top of the 318 poly head. The heads have been milled to achieve 10:1 compression and the cam is a 264 .450 solid lifter. I have the tti headers hooked to their H pipe dual exhaust with hush thrush mufflers on the end. I got the choke and idle nice and smooth. However I am having an issue. When I am cruising at any speed I have an ever so slight stumble...

Carb issue?
Author: Rooster34