Big Block in a 4x4

[mrein3]

I MIGHT be able to get my hands on a complete 454 for my truck. My 350 is tired so I have to do something one of these days. My engine rebuilder friend said for what I use my truck for I have two choices: 383 or 454. He said everything else is pretty much a waste of his and my time.

Given those parameters (383 or 454) I know some of you guys wedged a big block in your 4x4. I don't necessarily have to keep it stock but if I went with a 383 I could simply put that engine in in place of my 350 and use all stock components. If I go big block the General never made a 4x4 with a big block until after 1972. What kind of problems will I run into if I go down the big block path?

Do stock (from 2wd) exhaust manifolds work/fit?
Do stock (from 2wd) engine stands work/fit?

I know a lot of you guys have done this swap. What did you do?