Power steering Pump Question.

[Ccmano]

I’m working on a power steering issue on my car. I’m finding ZR-1 specific power steering pumps impossible to find at the local parts stores. Rock Auto has one, it’s an aluminum bodied pump not the OEM steel. L98 pumps are plentiful.

I have physically compared the L98 pump and the ZR-1 pumps. They are identical in every dimension. The only difference I can find is the supply hose nipple. Straight on the L98 Pump, slight elbow on the ZR-1 pump. The L98 pump bolts up the the LT5 perfectly. Tried it on the spare engine I have.

My question is this, are these actually identical? The racks they utilize are identical and interchangeable so I would imagine the pump output to be the same. Is anyone aware of any other differences, rotating in the opposite direction or some such?

Thanks
H