ok 1975 620 with single point dist. stock carb.
bought the truck running like poop so i did point,condensor, plugs cap and rotor, wires. runs and idles great now so I drove it for a week and then all the sudden on the freeway it fall flat on its face and starts missings and bucking. so I pull over to the shoulder restart it and it runs and idles great so off i go again down the freeway and again missing and bucking. so I figured out that if I drive like a grandpa it runs drives idles great but once I try to get on it alittle it starts missing but if I just turn the key off and restart it its fine. whats the deal here guys, I think it might be the coil since i had a similar problem a while back with a 510 I had but that one I had to sit on the side of the road for 5-10 minutes before it would restart.