I snagged a few parts. One of which is the bracket that my jeep needs for the power steering unit to mount to the frame. It's a factory piece for jeep that did not roll out of the factory with power steering, but later on the dealership could add PS in the buyer wanted it (or so the jeep urban legend goes).
I don't know if GMC had something similar, but I bet this part could be used for just about any vehicle for a PS conversion.
One step closer to power steering.