The 3rd gens used a 700R4 regardless of model as the automatic. Unless they changed that, but I can't see why they would have. Ideally they would wait for the new model year in '93. The 700R4 was used for the 350/305 as well, so yes it will bolt up. I'm not sure if the internals are as strong, though.
Honestly, I'd look for a Z28 as a project car, the RS Camaros have some weak springs/axles. Put a heavy SB in there (compared to the v6) it will droop the front suspension a good deal. Turd gens are very flexy, add on t-tops and it flexes more than a bow-flex. Subframe connectors are a MUST.
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'69 Road Runner 440/4-Speed | '69 Road Runner 440/Auto
'76 Trans Am 462/Auto | '77 Trans Am W72 400/4-Speed
'78 Trans Am WS.6/W72 400/Auto | '78 Trans Am 455/Auto
'80 Trans Am WS.6 400/4-Speed
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