[WANTED] Small Block water pump

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3420037 was used on 70 - 73 small block Abodies with AC.
Chrysler superseded that number to 3780109.
 
Look for a later one with the ribs on the snout, they have a larger shaft than the ones with the circles around the snout. They were originally police water pumps, but i see a lot of replacements are the one. They had a 5/8th versus the 1/2 shaft for the regular one.
 
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