Right on, it's a spark plug killer at idle. 11:1 A/F is off the wall FAT/RICH. That thing is a hot mess.
Get the ignition timing sorted out FIRST, then get the idle setting on the carb figured out. If you need different advance bushings for the distributor, I have them available in 10 and 14 degree sizing.
I bet it has little initial timing. Simple test, lightly loosen the dist hold down, start car and give Distributor a small twist clockwise. If the RPM picks up it wants the timing at idle.
I hope you have a timing light, you're going to need one. Put it on the car and see where the idle timing is set and at what RPM. A vacuum gauge can be a huge help as well when tuning. Consider them key tools when build hot rod engines/cars.
Does the engine crank a lot or need you to give it pedal when starting? More clues that it doesn't have enough timing at idle.
Look like 1 7/8" hooker fenderwell headers, get plug wires OFF the header and separated. No zip ties to hold all 4 wires together, that's BAD. Here's a heads up, with those headers. Run the wires across the front of your engine, then down and under the headers. Keeps them away from the heat as the tubes all go above to exit.
This is what happens when no thought is put into a car. That engine bay is nasty. You get a mishmash of really bad stuff, techniques, methods that now you get to sort out. Takes a little time, learning and patience.
