pulleys don't line up

by Jerry
(Michigan)

I have a 69 L46 with 4 speed, no power steering, no A/C. I bought a replacement waterpump, the "608" code pump. When installed the pulley does not align with the crank pulley. My old pump, also a code "608" has the fan mounting flange located 0.125 inches closer to the end of the shaft than the new replacement pump. The Corvette parts supplier swears the new pump is made to spec. Without this 0.125 offset the pulleys will not align. The balance and the pulleys all appear to be original to the car. What am I missing?

Jerry

Chris Trautman @ Corvette Assembly Plant 2019

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