I think I found a major part of the problem. It appears that the heat riser is not functioning properly. When the engine warms up it doesn't open (didn't check this until yesterday).The excessive heat from the exhaust really gets the intake manifold and pass side head very hot. I wired the flapper open and tried to get the car started again, but no luck. Guessing that the heat has cooked the intake manifold gaskets and this creates a huge vacuum leak. Checked all other components carb, fuel pump, coil, distributor. It just seems like the only place left to go.
