My brother was drawn to the dark side and bought a Mopar about 2 years ago. It's a 73 Charger and we just put a new 400 in it but we are having problems keeping the car running. It will start fine, run fine, idle great, and after 20 minutes it will sputter and it die.
After it dies you can see fuel when you pump the carb, but it does not want to start--I suspect vapor lock. The intake manifold and carb are very warm.
He is not having much luck on the Slopar Bulletin Board so I told him I would throw this one to the "experts".
BTW, the car has a mechanical fuel pump and Holley 750 Vac Secondary Carb . Compression is about 9 to 1 and it is a mild street motor...325 HP.
Thanks for the help.