So today my son and I went to start our '66 and it just clicked. He said there was a spark near the front of the motor. Now everything is dead, no lights, no click, nothing. The battery is full, new solenoid, starter fuse is good. What now?

 

Try cleaning the ground connections on the battery, starter and on the firewall.

 

Found the problem. The voltage regulator was stuck. Disconnected tapped with screwdriver, now it's all good. She's purring again!