Ive eliminated the booster from the system previously as a test, and no change in the driveway. Additionally, no change in idle speed when warmed up and idling and brakes pushed. So, booster checks out.
Theres a heat riser, i think. Its a 300 straight six. The exhaust manifold physically contacts the intake manifold right underneath the carb. Im sure that there has to be something passing between the two, but never took it apart.
When i rebuilt the carb a couple of weeks ago, i inspected the float closely. I found no evidence of fuel making it inside. No sketchy solder, no nouse when shaken.
Ive searched for vacuum leaks. Fixed all that ive found so far. I replaced baseplate gaskets between carb and factory spacer, and spacer and intake. I checked all for flatness, and dont recall finding anything
I just went back downstairs to check the idle screwlanding points. No wear or play that i can see.
However, i did see that the external of the carb body is wet with fuel, including the spacer and intake manifold. I had double checked all the carb hardware for tigness while i was replacing the distributor. They were tight. It appears that fuel is seeping from the gasket abive the fliat bowl. Tbis leads me to believe that the float is too high, or that fuel is boiling in the bowl. Hiwever, when it stalls, it seems to be a lean stall. Holding the throttle open doesn't restart it, but a shot of ether always does.
Electrical: wouldnt the issue present itself in the driveway before moving? Or be more prevalent with all accessories on?
Ignition: new distributor, cap, rotor, wires checked for resistance and that blue glow after dark. No issues. Have not checked plugs, but less than 5k in them. It has a ford electronic ignition box, but i have no idea how to test that for failure.