nomad
08-06-2023, 08:21 AM
Part no. 3736493 a correct one for a 1957 Chevrolet should not have the top hole drilled and tapped into the casting . Is that correct ? Also it appears that the truck water pumps have a different size tapped outlet hole from the passenger cars ? Bill mock appears to have sold out to (Chevy Cool ) . Hopefully they may have some answers ?
nomad
08-10-2023, 04:14 PM
The trucks had the top boss on the water pumps drilled and tapped for the Hydromantic transmission's . Also the water pumps with a " T " and a date code were from engines built in the "Towonda " plant and the 57 Chevrolet water pumps with no " T "and no date codes were build in the " Flint " engine plant .
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