not quite sure what you are spacing but the nose of the pump is necessary to center the fan blade not just the 3 or 4 holes around the pump. New aluminum pulley that do not have the snout protruding are not to be used with a mechanical fan. hope that helps Ed ke6bnl
1963 econoline, 50 f1 pu, maybe 53 chevy pu, 50 f3 pu, 70 chevy shortbed c10,
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