Update and a question:
Ended up replacing the fuel tank, the fuel pump, sending unit, rubber portions of the fuel line and filter. Also cleaned out thoroughly the metal fuel lines. (Problem was old gas that was left in the car for 4 years).
The car cannot start still and I'm pretty sure the carb is badly gummed up internally. (Fuel bowls are filled manually and still it only starts with gas directly poured into the intake, then dies).
I either have to take off the carb and disassemble and clean it out thoroughly in a bucket, or replace it. It's an old Holley that was on the list to be changed anyway, so I'm OK with replacing it at this point.
Question: What's your opinion on best Holley match for this engine?
1973 351 Cleveland, 4-barrel.
Original Ford 4-barrel intake and heads.
The cam is slightly aggressive. Was chosen to help with the engine's low-RPM velocity.
Thanks in advance.