Re: V6 water pumps getting hard to find
My '67 351E (no power steering originally) had the iron pump with the short gussets on it before I rebuilt the engine. No idea if it had ever been changed. I replaced it with a NAPA 42099 which is iron with the long gussets like the one in the second picture. The NAPA 40299 appears to be identical to the GMB 1302835. The 1967-68 GMC light duty parts catalog shows part #8875385 as the water pump for all 305 and 351 V-6's.
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