This is no doubt a stupid question, but you have to start somewhere. What does ping sound like? How would I know if the car was "pinging"? This is a 351C 4V with modifications. Never fails to start at first turn of key and has plenty of power. The problem being, the timing is set at 15 BTDC which is too far considering 6 BTDC is factory recommended. Unless there is something wrong with the timing marks, what gives? I use 91 octane gas that may contain ethanol.
mike