Re: Right Water Pump for My '72 ?
Our primary local rebuilder has two list prices for his services: $109.88 for a small bearing/shaft pump and $129.85 for a big bearing/shaft pump. Typically, SB water pumps have small bearing/shaft configuration while BB pumps use large components.
BUT, the 3991399 changed that. It was the transition pump for SB engines that introduced the ruggedness of the BB water pump construction (big bearing/shaft) AND adopted the big/wide bolt pattern flange for mounting the fan/clutch. So, it qualifies as a 'big' pump in terms of rebuild cost.
Our primary local rebuilder has two list prices for his services: $109.88 for a small bearing/shaft pump and $129.85 for a big bearing/shaft pump. Typically, SB water pumps have small bearing/shaft configuration while BB pumps use large components.
BUT, the 3991399 changed that. It was the transition pump for SB engines that introduced the ruggedness of the BB water pump construction (big bearing/shaft) AND adopted the big/wide bolt pattern flange for mounting the fan/clutch. So, it qualifies as a 'big' pump in terms of rebuild cost.
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