So, the mystery has been solved. I brought the generator to the old-timey electric repair shop. The nearly 90 year old owner immediately spotted the problem. It's a counter clockwise generator. How the hell I ended up with that I'll never know. Anyway, he said it's real simple to switch the field windings to make it clockwise and he'll have it done tomorrow. Score.
49 Chevy 3600
65 Chevy K10
48 International KB-1 Service Truck
55 Willys CJ5 - Chevy 331 powered
26 Model T Roadster Rat Rod
70 Tucker Sno-Cat 442-A
96 Dodge 3500 Cummins dually flatbed x-cab 4x4
06 Jeep Wrangler LJ rock crawler
If you can't fix it with a hammer, it's an electrical problem
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