Keith -
You wrote:
Quote:
I think it was the Golden hawk that had a shaft bushing in the pump cover at the BOTTOM of the pump.
The 56J version of the Packard V8 oil pump (with no vacuum pump) simply uses a flat bottom plate with NO bushing.
I believe it was an article published by PAC some years ago that expressed the notion that the "Hash" pump used a cast bottom plate with bushing. However,
Turbopackman (Eric) advised that he had one of those units apart and found no such bushing. Perhaps that casting was intended as a sacrificial bearing surface.
I'm no engineeer, but doubt that a lower bushing is needed. I've heard from more than one source that the oil pressure around the gear should have a self-centering effect - at least, within the pump body.
IMHO, the installation of an upper bushing (along with new or reconditioned driving shaft) appears to be the best approach, but I would also add an oil channel (as you discovered in the SBC pump) to lubricate the driving shaft and bushing.
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