I have a 1969 AMC Javelin SST - 343 with a Carter AFB
Carb - my problem
is that after the car has sat for a day or two it is very hard to start -
it requires pumping the accelerator at least 8 times - once it is running
normally it starts fine. A new fuel pump was installed and a carb kit.
If your like me, then one of the extra pieces in the carb kit apparently
was important.
My guess is that the gas is leaking out of the carb after sitting a few
days, or leaking out of some portion of the carb.