This is a FEDERAL power steering pump, with reservoir, that is used on Mopar big block, and small block, engines used with the respective mounting bracket(s) for the engine application.
I was told when i purchased this pump, it came off a 71 big block, and was a replacement, rebuilt unit.
But i cannot verify that provenance.
I have no clew on how long it may have been in service, before i got a hold of it.
Before i cleaned it up, it didn't show any leaks out of the shaft seal, or reservoir...
FEDERAL Power Steering Pump With Reservoir. Chrysler, Dodge, Plymouth.