Interchangeable chassis parts

Hi,

Couldn't think of a better title but my question is:
Can some one point out what frame, floor, k frame and suspention parts can be used between different year A bodies ?

I myself have a 69 2dr Valiant and I'am looking for a donor to get better frame rails, crossmember and inner fenders.
Currently there is an 64 2dr offered as parts car near me.
How much can I used metal from there ?

Kristjan.