When working with old Pontiac engines, there were two main water pumps used on vehicles. The first of which was used from 1964 to the early part of 1969 and can be identified by its 8 bolt holes. In the middle of 1969, Pontiac switched to an 11 bolt water pump.
All CVF Kits require the use of the 11 bolt water pump that was used post-1969. CVF Racing offers an 11 Bolt high-flow pump in both black and as cast.