If the engine is a stock 1950 with babbitt rods the "official governed" rpm from Chevrolet is 3200rpm. This is what Chevrolet would set the RPO Governors at for fleet usage to keep the rod bearings from wallowing out too much and needing frequent "shimming". In addition, the dipper/trough/squirt oiling system was A-Ok at 3200 rpm.
Peak horsepower was often given in the 3200-3400rpm range in sales liturature with a lot of caution made by Chevrolet for exceeding 3600rpms for extended periods.
Tachometers were very rare in the early 1950's Chevy trucks as they often had to be mechanically driven. Todays electric tachs are super for preserving the life of your engine; helps you keep the rpms under 3600.
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