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Old 08-16-2016, 12:51 AM
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Nathaniel1234 Nathaniel1234 is offline
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Join Date: Mar 2006
Location: Chicago
Posts: 218
Default Impeller spacing, water temp sensor, reverse flow

Thanks Bill, yes I have clearanced the plates closer to the impeller on 65 and up water pump assemblies by modifying the plate insert. Can I modify that piece in the back of the cavity?

There is a female thread in that custom piping which housed the factory 1955 water temp gauge sensor, I just threaded in a autometer sensor in exact same place.

The 421 SD (it is a 61 actually, not a 62 like I said below) is not a reverse flow cooling engine like what came originally in 55. I did wonder if maybe the 55 radiator might operate differently as part of a reverse flow system, but didn't really think so.