I see that, went to the site and noticed that water pumps for pontiac come with a 4" or 4 1/2" shaft...getting the wrong one can mess up pully alignment (FK only comes with 4 1/2" shaft) Anyone know what was stock and how to know what you got..Went out to see if it was possible to measure the shaft...but I dont know what/where to start the measure point.
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