Well that was a drag. 8 hours of my time lost to looms and headaches.
What a joke the wiring was - I don't know how that thing even started. It was basically rigged through the LT1 electronics(!) and back to the starter instead of the normal battery/alternator/starter setup. All of the stray wires probably confused the previous owner and led to the wiring fiasco.
Car starts like a champ now.
It wasn't my starter going out either - just the jacked up low voltage to the starter 'cause it was routed through the fuel injection electronics(!?!). My passenger headlight still doesn't work and nethier do my turn signals now despite good fuses and a new flasher. I've got a new front harness from Rick's that should fix the headlight. Who knows why the turn signals quit working....
Gotta love old cars! Except the electrical part. -eric in boulder