Some 66 GMC questions

[killthewabbit]

Hey guys, I'm over in this section from my usual haunt in the 73-87 section. I have a few questions for yall. If you wouldn't mind answering, I would greatly appreciate it.

I'm looking to trade my 69 Chevelle (pics here)for a 66 GMC (craigslist ad here). I've kind of lost interest in the Chevelle, and have always liked the 60-66 style GM trucks. The GMC is a 6 cylinder with 6 lug wheels and leafs. I would rather have had 5 lugs, a V8, and coils all the way around. I do have a 78 Chevy SWB sitting around with a V8, TH350, disc front, 5 lugs front and rear, and what I think is a frame problem.

Questions -

1. Does all the suspension and driveline stuff transfer over to the 66 from the 78? If I can bolt in my front discs and my rear end, this might not be a bad idea. If I can't, it would be a deal killer. I saw the disc conversion sticky at the top, so it looks like the fronts should work (if my reading comprehension hasn't failed me) but what about the rearend?
2. I don't mind the surface rust, but the floorpans have two "half dollar" holes that need fixing, along with a driver's rocker and cab corner. There's also some rust on the door so that it's separated from the outer skin. Who makes patches and parts for these years? I would assume Brothers, but yall would probably know someplace better.
3. Am I completely crazy for considering this trade?

Thanks in advance for the help