A Camaro SS would have fast-ratio power steering. Short steering arms, longer [5.75"] pitman arm. If the manual steering gear has the fast ratio pitman arm and manual rag joint, bolts right in. If not, you will have to find long steering arms from a disc brake car. Think the manual rag joint is still serviced.
Both fast ratio pitman arms have the same forging number but are machined differently for manual and power. Long discontinued, not serviced.
Should be easy to find a manual box off a Z/28. Removed by an owner that quickly tired of heavy, numb, miserable manual steering.
I have absolutely no idea why anyone would do this.