Why won\'t it run? I have a 67 C10 with a points distributor on a 350 out of an 80's van. It was running badly with a miss, now it won't run. Power tests good through the coil, the cap and rotor are a couple of months old, but no spark is getting to the plugs. Points are new with dwell set correctly. Wires are brand spanking new. What could the problem be????