Sounds like you want to switch to a rod-input linkage. If so, why? Seems your slant car came w/ the cable throttle linkage, so if it works, you should keep it. Matching carburetors are more common than the rod-input type. If you don't have the kick-down linkage, I think the linkage from any 1967-1980's slant engine would bolt up, probably including trucks and vans.
Re compressor and brackets, I think your car would have used the same Chrysler RV2 compressor used thru the early 1980's, so one from any slant should fit. Those are reliable and easily available, but they are a heavy beast. If you don't care about original, the later Chrysler C-180 compressor is smaller and more efficient. Even better is the Sanden used on some 1977-78 Volare/Aspen but might need a thinner battery for an early-A. There is an AC thread w/ many photos of options.
Somebody was smart to upgrade your brake master cylinder from the single-pot to a dual system.
