help with 1959 gm water pump, or what it really is?

[mog797]

Ok so the pump in question came with my 1959 gmc with 270 engine. One of my questions is this Pump from Canada reason I ask that is cause I am told US pumps have two holes on the back side. So if it's from Canada how do I get a replacement I am having hard enough time with that to start I would prefer to get one with pulley attached as again I hear it can be channeling to get done ones self. Anyway just trying to figure out what I have and then what to do.

Thanks!