Looking for diagnostic opinions. Hemi 331. 3 deuce 97s, new tank, carter electric fuel pump, MSD distributor with magnetic pickup, MSD 6AL contol unit. Just recently, cruising at 60, engine starts to balk and finally shuts down. Wait 5 to 10 minutes, then starts right up and then repeats sgain. (Driving me "=÷%×+ crazy.