I have a 1971 Charger 383 HP with a 509 purple shaft cam, .30 over, roller rockers, Holley 750, MSD 6AL,727 w/ a 3500 stall, and I am having problems with the engine stalling when put into gear. I have messed with the timing, the idle set screws and still no luck with it idling properly in gear. I have to drive the car with both feet (one foot gas, one foot brake)