Sounds like problem solved!!!! Good call on removing the fusible link on the alternator feed. The only way an alternator can short out and cause a problem is for one of the diodes in the rectifier circuit to fail. The good news is that when that happens the diode burns open. AA is right about twisting power cables to help reduce interference due to electrical noise. The wires going to the ignition box should be twisted and the wires from the ignition box to the coil should also be twisted. Anyway the problem is solved so all of this is a moot point.