[STORMINORMAN]

...it was basically a catastrophic failure, i.e. fluid blown out through the front bearing/seal assembly behind the pully. Other than the 15 year age I truly believe it was related to the previous crank pully failure and the resulting strain it must have imparted to the p/s pully & shaft.

As previously indicated the lifetime guaranteed p/s assembly from Rockauto.com was a direct replacement but does not include the "connector", the switch, reservoir, cap, screen, etc. but does include a couple packages of O-rings. Mine works very well and would seem to be appropriate for both types of p/s systems. From all that I can determine the material differences are in the rack assembly itself, none are on the top of the engine.

Cheers!