That's close to what was used in the '46 models, before they switched to the vacuum shift units. Ratios would have been 6.03 and 7.99 (I'm assuming the ratios changed from the earlier ones for the '46.1 models--the parts books don't distinguish between '46 first and second design). Serial number prefixes for the '46 second design 2-spd would be PJ or PK. '46 first design serials should start with an O.


Curt
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1953 Chevy 6400, 1957 Chevy 2dr Sedan
--"Mediocrity is easy, the good things take time"