This rebuild/reseal kit is for Shadows and derivatives that use RR363.  This kit is not for later SZ cars using mineral oil.  This is the most complete kit available as it includes not only new EPDM o-rings but all new retaining rings, springs and the seal for the fluid feed pipe as well.  Cars before 6644 don't have a fluid feed pipe seal.
BTW can rebuild and test your pumps for you for $195 ea. which includes the cost of the kit.