A/C Heat options

[chevy.c10]

What I want to know is if there is a cheaper more cost efficient way of putting air conditioning back into my truck because it originally had it, but doing it in a way that isn't going to cost 1000$-1500$ to do it. I was wondering if you could just adapt a system from a late model truck like a 96 Silverado for example if I took the 5.7 vortec out of it could I take the a/c heat system out of it and easily make it work in my 66 or possibly like out of a newer model truck that was equipped with a 5.3? Im just looking for options and to see who has done what. Any input is apreciated.