water pump pulley????
 

just got some new aluminum pulleys for a short water pump, i have a 74 with a 350 5.7l, the whole in the center of the pulley is to small and the 4 holes for the bolts are closer together then mine, does this mean i have a long neck water pump??????????? thanks

RE: water pump pulley????
 

My understanding is that the BB's have the long and short waterpumps. I believe that the SB waterpumps are the same size. I can't explain why the holes don't line up though. It may have something to do with the volume of water that the pumps are designed toput out, as to what application. :eek:
Could also be determined by how many accessories are run off the water pump pullies.

RE: water pump pulley????
 

Check this out:

http://store.summitracing.com/partde...p;autoview=sku

If you read the notes:

Notes: Will fit 1955-1974 Corvette models with 5/8 inch shaft. Bolt circle is 1 3/4 inch. Pulley depth 2.75 inch.

When pricing my water pumps, I came under the assumption that the little nub on the end was bigger on a Corvette, and when I actually disassembled my old one, it has, like, a plate on the back of the little turbine inside, I guess to prevent cavitation, so maybe it has a bigger bearing or something, but the Corvette def. lists a different water pump part number than a "standard" short water pump at the parts store.