I have a BBB that is going into a '70 GS455 without AC. Water pump is TA short. I plan to use a clutch fan and '70 repro fan shroud. According to the Mark Deconti article, the non-AC pulleys are PN 1375141 water pump and PN 1375142 balancer. However, elsewhere I have found info that says 1375141 and 1375142 are only correct for non-HD cooling applications without clutch fan. I want single groove water pump and 2-groove balancer pulleys with correct ratio for HD cooling with clutch fan. For '70 Stage 1 non-AC cars with HD cooling, what are the correct pulley PNs?
I have a single groove water pump pulley, not sure what the number is though. I can check. I might have a a double balancer pulley too
