In case you don't have one, here's a copy of the 1961 wiring diagram.
http://www.oldcarmanualproject.com/t...re5765-333.jpg
It's not clear - did the car work, then you did an alternator conversion, and then it didn't work? If that is indeed the case, tray backtracking the changes made to the wiring.
If that isn't what happened then I'd suggest starting with something fairly simple. For instance, the headlights should come on whether the key is on or not, so check to see if +12 volts is getting to the headlight switch and go from there.