Splined Pump Mounts 

Used with 9,11, and 13 tooth splined crankshafts this style mount allows for pumps to be mounted directly centered on the shaft to prevent wear and damage due to misalignment and sideloading of the bearings of the pump. 

Quick notes about the "A" pump style: the 4.188" or 4-3/16" across.

Quick notes about the "B" pump style: the 5.75" or 5-3/4" across.