68 H-code 'cuda - needs just about everything

My Barracuda is a 68 383 car. When I got it, there was no motor, trans, driveshaft or radiator. For my first go at getting it on the road, I'm more concerned with just getting parts that work and fit without hacking the car up than making it numbers matching perfectly correct.

A few questions for those who've been around the block a few times:

As I'm looking for parts for this thing, can anybody offer any insight what to specifically look for or avoid? I found a 383 from a 69 B-body. Will this motor work? Will any old big block 727 work, even like... out of a truck or something? Will a driveshaft from any other car work or will I need one custom made? What radiator should I try to find? Is there one from some other car that will work good for a big block Barracuda or should I go with some kind of aftermarket aluminum job?