Caddy Big Block in 67 C-10?

[72c10step]

I was wondering if I could get some input on this topic from some of the people on the board here. A friend of mine has a 67 C-10, and access to a (complete car, FREE!! ) 79 Cadillac with a 7 liter engine (425? I believe) that runs, and he wants to stick it in his 67 C-10. I know some of the guys on here have done this swap before, (Longhorn Man I believe has the same setup in his truck), and was hoping I could get some tips, advice, words of wisdom, things to watch out for, etc. for this swap. Is there any write up on this type of swap yet, and can any of you give us some pointers so we aren't going into this blind? Thanks