Maybe no one here will know but this one has my curiosity up...

Playing the parts mix and match game with power steering components. I find that on a '92 Camaro there is a pressure switch in the high pressure steering line, but only on the cars with A/C.

So my question is what function did this switch serve?

It apparently is not a safety/diagnostic function or it would be on the non-A/C cars as well.

it cuts out the A/C compressor on sharp turns to add engine speed for more boost.