Quote:
Originally Posted by xb-60
Dan and Bob,
Do you have a picture of the 6423 pump that you can post?
Cheers,
Glen
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At some point after finding whatever can be I will have a slide show file covered engine mounted pumps for all chassis. The draft is already about twenty pages long. This subject is being difficult to gather information on because so few early cars stayed substantially intact as built. Three of our better data points are cars parked by circa 1967 and not run or moved for decades. Bob’s car has its original pump and that is our best sample to date. It would be really great to have five or more additional examples to get some information from.
How about pumps available for sale used, rebuilt, remanufactured, new replacements, new old stock replacements, and or new old stock from 1962? All the variants are confounding the research. At this time we know of four different manufacturers that made pumps for the same engine application. I have come across more companies that have sold rebuilt or remanufactured units than I can recall. All four brands are similar and some (but not all) parts will interchange. The rebuilders and remanufactures often mixed parts from all brands into one “remanufactured” pump. Example: One remanufactured pump could have a new made rocker arm and each of the three die castings could each be from a different manufacturer. The one part type Bob has identified that does not interchange into all valve bodies is the cartridge valves. There are valves of different designs and most importantly different in outer diameters which is the critical detail to be able interchange.
A theory is that all four brands were an AC-DelcoŽ design made under license by three other companies at some point in time or another. It also possible that the original design was made some other O.E.M. parts supplier and AC-Delco and others made them under license.
At this time I don’t want to post the single brand associated with day one in new Cobras to reduce the temptation for anybody creating data just to participate.