Re: Water Pump Gasket
I ran into the same problem with my 811 water pump, the #11725 gasket I believe is for the earlier big block short pump even though everything say's it for a later year and the gasket that I found to be the correct one was the #13032 gasket if I remember correctly.
I also replaced it while it was still on the car, a little tight but it can be done.
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1970 Chevelle SS396 L78 4spd 410 posi astro blue
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