My 1966 Convertible will starts but will not stay running after it starts. It will stay running if I bypass the ignition switch at the coil primary. I have replaced the igniytion switch, no change. Where is the next logical place to look?

Go to the home page for this site. In the left hand column there is a "diagram index". Go to the "65-66 charging system diagram". That may be a help in finding your problem.