Guys,
Get a Ford SVO catalog, they list a water pump impeller for the 302/351's
that is "cast iron high efficiency curved vanes to reduce coolant
cavitations (partial vacuum) at high RPM.
It is part number M-8512-A302
They also have two pumps assemblies listed as stock unit with a stamped
steel impeller and a NASCAR race pump with the aforementioned cast iron
impeller.
There are also assembly kits (brass slinger sleeve bearing shaft, impeller
seal, seand assembly, and fan hub), housings, and cover plate gaskets.
The SVO catalong is a wealth of info and engine sourcing for parts that are
trick.
Regards,
Jim
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