u/Tall-Information4946

I have a 1988 351w equipped e150. Been trying to sort out this issue for awhile now. Under electrical and throttle load (above 50% throttle) it stutters and picks up what I assume to be a misfire. The previous owner put in new plugs, wires, and distributor cap. I just went in and double checked his work and I reset the initial timing. The battery and alternator appear fine with multimeter tests. The engine ground is good. At this point I’m out of ideas as to what could be causing the issue, and I’m curious what y’all think. I’ll include 2 videos of the stutter happening. If nobody can think of anything I’m at the point to give up and take it to a shop lol.