I have a 72 340 demon, and it started a few months back you could start the car and stop and go to start it and it would click, like the terminals was loose. Turn terminal on the ground side and it would start, did that 3 or 4 times now it has nothing but everything works, lights, horn wipers, etc. but you turn the switch to start the car and it has nothing not even a click just like it does not have a battery in the car. I replaced the started relay and nothing so I was thinking the igination switch is next, anyone have this problem??? Any help is appreciated, Randy