[66Submarine]

Also note that the Carter (A.K.A. "Edelbrock") AVS/AFB carbs like that are known for not tolerating the higher fuel pressures a lot of pumps put out; a lot of people think anything over 5.5PSI is enough to cause problems. 4-5.5PSI seems to be the normal recommendation.

Also, (at least sometimes) the crap mechanical pumps can build really stupid pressure; my father said his pegged a 20PSI gauge at times!

My father had hot start problems with his, and AFAIK he doesn't anymore with the pressure regulated down (something like 4.5PSI IIRC).

Might not be the problem, but it's something to consider.