Which engine/year? They are different.

Most of the GMC engines have the pulley pressed onto the water pump, so you could just get a new water pump. The later Chevy 235/261 engines are held on with the fan bolts and aren't reproduced, but there are lots of used ones available if you put a want ad in the Swap Meet section.


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A lone amateur built the Ark. A large group of professionals built the Titanic.