Hey everyone, I'm new to the forum. I've been beating my head against the wall trying to solve my issue... Here it is.

1976 Corvette

496 BB stroker 10.1 : 1 comp.
th400 trans
quickfuel 850 carb
quickfuel reg set to 7psi
quickfuel hp155 pump
msd 6al box (replaced)
msd pro billet distributor (noticed rust on pickup, have not replaced yet)
pt# 8361
msd hvc blaster coil (replaced)
ohmed all superconductor msd wires and they check out 40ohm/ft
new ngk plugs gapped .040
timed 36 deg total advance 18 in motor 18 in distributor

Car ran great for about a year and a half in Chicago. Moved to Florida (Tampa). Drove the car for a couple days and it started acting up...
From a stop, if the car idles at a light, if I leave the light hard it sounds like it is breaking up. Accelerate through 3rd and the motor chokes and dies. Can't even feather the pedal to keep it going. Need to stand on the accelerator to get it fired up again. Spits fuel out of the primary vents of the carb.
Also, noticed when sitting at idle in park, it is fine. When I bring the Rpms up around 3000 the engine sounds like it is dropping a cylinder and the rpms drop sharply about 3-500 rpm and never regain through acceleration.

Would rust on the magnetic pickup inside the distributor cause something like this?

For the longest time I thought it was a fuel issue... The car originally had a mechanical pump. The first thing I did was replace the mechanical with an electric one. No change. Replaced fuel line. No change. Added a heat shield to the bottom of the carb, no change. Sent the carb back to quickfuel to be rebuilt, no change. Replaced plugs multiple times, no change. Ran new ground from battery to frame, battery to bell housing, 2 straps from frame to engine block (cast iron heads) no change. Replaced 6AL box, no change. Replaced the coil with a Blaster 2 coil, no change.
Short of replacing the distributor or carb, I don't know what else to do besides rip the interior apart and rewire the whole car.... Or go EFI! I should be able to figure this out... I won't stop till I have!

Ideas???? Please help me figure this out! I've been at this for almost a year and have spent way more than I wanted to all for no reason so far!