1970 1/2 Pontiac Trans Am - Ram Air Roulette
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A basic 37-amp alternator could be found on just about any Pontiac V-8 engine that didn't have A/C or a rear window defogger. Code "1100902" (1100903--55 amp and 1100904--61 amp) identifies it and "OA15" (O-70, A-January, 15-Day of The Month) is the date code. "SD" identified the 37-amp unit for the assembly-line workers. View Related Article
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