Previous mention of this in the River Fun Run report piqued my curiosity. Thanks for the pix.
Clearly, the late design pump for the Super Eight has gears with a deeper root.
However, in addition to increased flow and pressure, the article on the "New Super Eight Oil Pump" (in
SC Vol. 21, No. 2, p. 6) indicates a different casting number on the pump body. The factory wouldn't change that number unless there was some change in the casting itself. Wonder what else changed?
WRT to the V8 pump, repairs that follow Bob Aller's approach of bushing the pump body and truing up the driving shaft, while retaining OE gears, seem to resolve the problem - unless there is latent collateral damage to the engine. Odd that Packard went to the trouble of redesigning the V8 pump body and pressure relief valve, but kept the same gears.
I'm thinking there might be off-the-shelf gears with a deeper root that will fit the OE V8 pump, but won't look into it until I have reason (and time, space, and money) to remove a pump from one of my own cars.
Meanwhile, I've heard, more than once over the years, mention of using Cadillac gears, but no one has provided any specific details.
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