Thread: SBC Help - Water Pump & Pulleys

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Here's some actual data with no assumptions. My '34 has a Fast Burn 385 crate motor. It's essentially a ZZ4 with Fastburn heads. The harmonic balancer is 1.5" thick x 8" dia. It came with a long water pump, and I changed it to a short water pump. I used pump and crank pulleys for a short water pump and Billet Specialties alternator and A/C brackets. Everything lines up and it works fine.

One other small item . . . I had to replace the composite timing cover with a stamped steel one. Read the following caution from Chevrolet Performance:

If a short water pump is to be used on this engine, there will be clearance problems between the water pump backing plate bolt heads and the composite timing cover used on the Fast Burn 385. Many times this problem can be fixed easily by replacing the bolts on the water pump backing plate with button head Allen bolts. If this approach does not work, the timing cover will need to be replaced with a sheetmetal or any chrome unit. Any small block Chevy timing cover will work on the Fast Burn 385. If the timing cover is replaced, dowel pins are also needed.