Gentlmen, I may be way off on my trouble shooting solution but I will advise what occurred ref my restored 1968 fb conv while in Ocean city for cruise In. My 68 on a few occasions would not start, as well I had no power to anything ie lights radio etc. As well I would be driving and the engine would die and the electrical would go dead. Bottom line my horn relay, which is a major ground for the vehicle was loose. Problem Solved !! fires up everytime now. Sorry if I'm way off base. Chris