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Old 06-08-2021, 11:55 AM
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leeklm leeklm is offline
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Join Date: Mar 2013
Location: Mpls, MN
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Default 8 bolt vs 11 bolt water pump?

I have only worked with the 11 bolt pump, clearancing the plate, etc... are there any differences to be aware of with the 8 bolt pump? Next step is to remove pump and checkout out.

Helping a friend with his new 389 /66 gto running warm at 70mph highway speeds.

About the only thing we have not tested/tried is to check plate clearance with the cast iron flow cooler pump and trying the smaller pump pulley.

I would have to think the engine turning 3k rpm will be spinning the pump plenty fast, thus negating any benefit from the smaller pulley...?

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