I am having issues keeping my 65 running. It starts fine and catches a good idle while parked, but after driving it abruptly stalls without warning and has a hard time starting up again. After my recent breakdown I noticed the ALT light flickers. I have recently replaced the Voltage Reg and Starter Solenoid with quality parts recommended by users on this forum. I also replaces the Alternator about 6 months ago. What am I missing?