Welcome. Without a doubt Kaiser built these A1s from scratch. At the time, CJ-5s were being churned out in Toledo so the minor tooling changes needed for A1s would have been easy. Rebuilds were almost never done on manufacturer’s assembly lines.
Carefully touch each electrical connection between the batteries and starter after prolonged cranking, the one that burns your finger is causing the slow cranking. If none are found your starter may be dying.
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