The points on my 73 truck keep fouling out rather quickly. It causes the engine to miss annoyingly when under load. Everytime I replace them it runs great for about a day then back to crap again. Ive replaced everything electrical except the coil, could that foul my points out? I think its the original coil? My uncle said a resistor could cause it but we dont know if my truck has one or not? I know if the distributor has play in it the points will foul so I checked that and it doesnt. Any thoughts anyone?