Re: GM p/s conversion
I used a 74 Trans Am box on my 79 CJ5. I went from 4 turns lock to lock to 2.5. It's great in the woods maneuvering arounds trees. The box is a bolt up but you'll need to look at your hoses. My 79 used the same as the 74. For once something worked nicely. Mine were flared hoses. Here's an option to look at. Use 79 hoses, the pump side should,check it,,, be the same.
one more thing, the 74 T/A was a variable ratio, so on center the steering isn't touchy. It get progressively faster as you turn the wheel. I've got 9 years ruff service on mine. The Camaro should be the same.