engine dies

[hank]

ok, i'm having a problem i can't quite figure out, so let's see if ya'll can help.

my engine dies, acts like it's out of gas from anywhere from 2 to 30 minutes, then starts back up again and runs just fine. it usually dies when i let up on the gas, like coming to a stop sign or making a turn.

i just rebuilt my carb to correct this problem, but, it's still happening.

i have a 350, a rochester carb and HEI.

the only other clue to this puzzle is that the problem started right after i installed HEI.

any help is appreciated.