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Re: Is this the right water pump for an L31 Vortec with Vintage AC?
Just go to your local auto parts store and get a long pump for a SBC. I believe they started using long pumps in the early 70's on all chevy small blocks. My 70 has a short pump but has the heater return fitting and also I used the top fitting for the coolant bypass. Yes all vortec heads need some sort of bypass.
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Terry
1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC
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