If any one is looking for a water pump for a 350 go with this GM part no. 12529305
This pump is better the OEM that came with the truck. The machining is much nicer where the hoses fit and the pump is stonger. Here is one part where the replacment OEM part is better then OEM.
N R Company PN Part Description Link Price CC N GM 88894341 Water Pump SBC Pump - Late-style cast iron water pump with long mounting legs. This pump has a reinforced snout and 3/4" diameter shaft. The end of the shaft is reduced to 5/8" diameter. Used on the 350 HO 330 HP, 383 GMPP crate engines, and ZZ4. [Old P/N 12529305]
This pump is better the OEM that came with the truck. The machining is much nicer where the hoses fit and the pump is stonger. Here is one part where the replacment OEM part is better then OEM.
N R Company PN Part Description Link Price CC N GM 88894341 Water Pump SBC Pump - Late-style cast iron water pump with long mounting legs. This pump has a reinforced snout and 3/4" diameter shaft. The end of the shaft is reduced to 5/8" diameter. Used on the 350 HO 330 HP, 383 GMPP crate engines, and ZZ4. [Old P/N 12529305]