This is a bit off the mark - but I'm going to ask anyway - will the single groove water pump pulley off an old 289 (or even some GM product) fit the snout of my 312?
I'm looking to jack up the pump RPM without spending my kids inheritance on the one from Concours. The prospect of relocating the mounting flange a bit on the pump shaft (to keep things lined up with the alternator) doesn't terrify me too much - but......it might not be possible. Could be it'll be difficult to do with what I have to work with and I'll have to go another way.
Gary - is your clutch fan set-up rigged for "temperature release" - or "speed release"?
Steve Metzger Tucson, Arizona