I haven’t followed this post all the way thru, but do you have good pump shot? I would adjust your mixture screws using a vac gauge. Adjust 1/8 turn each screw til you get max vacuum, then another 1/16 turn each screwLeave it there for now. Do this with low rpm and in drive. As long as you have ignition advance and enough fuel, there should be no hesitation or pop. If that doesn’t fix, than there’s something more serious going on with it.
i did this, just not in drive. i did it in park. does that make much of a difference?
