QuickFuel 880 Surging/Missing At Wide Open Throttle

I will find total timing out tonight. Been meaning too but just haven't yet. I am running vacuum advance from the dist to the carb. The plugs I pulled where hard to read as they were pretty black for the initial rich jets. I did put 4 new ones into holes that were easy to get at and after a bit of a run they were lighter than the usual light brown I have been used to with previous carbs. The missing starts as soon as I put my foot down but don't notice it when cruising at 2500 rpm. I never noticed any issue when I had the 780 Holley. It was great on the top end with no miss, but always sluggish off the hop. I swapped the holley for a Demon 750 all mechanical but wouldn't pull like the Holley vacuum secondary carb did. I did notice some surging at highway speeds with the Demon but from a start to WOT situation, I never noticed surging/missing like I do now. This 880 QF electric choke, vacuum secondary pulls like a freight train from stop to WOT except for this miss/surging thing.From a stop and hammer on it, I would say it becomes noticeable at about 3500-3600rpm and cleans up just before it shifts at 5500rpm. Maybe its time to swap out the ol' Mopar Distributor and box. Sure hate to spend that kind of cash though,as a MSD Ready to Run seems to be the preferred choice.
I will determine total timing tonight and see what I can see from the new plugs I have put in after a run at hiway speed for a bit. Then report back. Thanks for the help.