1946-1949 1949 Start Issues

[FabCad]

One day my 49 decided not to start. I checked all the wiring and everything appears to be good. I took the NSS apart and cleaned it, and it is working properly. I finally thought I isolated it to the starter. With the ignition on and starter button engaged, it would finally start when I hit the side of the starter with a hammer. So I bought a rebuilt starter and installed it today. No luck, car still will not start. I hear a click at the starter solenoid, but the starter does not engage. Either I bought a bad starter, or it's a different issue. Any advice on troubleshooting?

Thanks,
Fab