Lalo,
You certainly have a lot of ideas, some of which are truly ambitious. The four wheel drive can be done on almost anything but you are talking about a serious project requiring professional assistance.
Your best bet is to subscribe to current magazines dealing with street rods, basic engine swaps, how tos, etc. Do a lot of research BEFORE you invest in anything!!!
I would stay way from the 6 cylinder engines and go with a small block early Chevrolet engine, i.e., 283, 327, 350 cubic inches. You should not have any serious problems putting this type and size engine in almost anything.
This reply could go on forever. There are some extremely knowledable people on this web site, but you need to do your research and get more specific as to what you intend to do.
Pick out a vehicle that is readily available and that you like the looks first. Then decide on what you want to do as far as engine changes etc. THEN get on this web site (or others like it) and ask specific questions as to how, what , when, who, etc.

Good luck,

Harris