Engine dies when hot, in gear

I’ve been on and off chasing gremlins for a few years now and haven’t been having much luck. I have a 74 duster with a 318/727, Edlebrock AVS 2 carb, performer intake, headers, edlebrock coil, summit distributor, and blue hi Rev ignition box. Previously it was hit and miss but it’s getting more consistent if it’s the same issue.
The car will run fine for 20-30 mins then stall when stoped at light or stop sign. Shifting in neutral and revving seemed to help but after doing that the other day I couldn’t get it to stay running at all (fortunately in my driveway). Once it cooled down, fired right back up the next morning.

Over the past few years I’ve changed the key switch out, bulkhead connector, coil, ballast resister, distributor, plugs, wires, ignition control module and carb.
Yeah that’s a lot of shotgunning but it sat for over 10 years before so I figured it couldn’t hurt.

Today I added a carb spacer with no change. I put a clear fuel filter in line and looks like the fuel is bubbling in the filter so I’ll try and new filter tomorrow and move it farther away from the engine.

I’ve hooked up temporary wires to the coil and measured voltage at the ballast resister and + coil while it was having issues. Seems like the coil +voltage runs between 5-9 volts and the voltage at the resistor was generally 12-14v.

Initially I thought it was electrical but I’m leaning towards fuel related now that I’ve seen the clear filter bubbling and being empty after it’s gotten hot and sat for a bit.

Just wanted to see if anyone else had ideas since I have a couple days off and hope to play with it this weekend. Will get new rubber lines and move a metal filter away from the engine in the morning. Thanks for any insight