Duramax in 67 K10

[my69camaro1]

Wondered if anyone had much input on the subject. How hard would this be to do.
I will soon do the body work on the truck in my Street Rod class.
After it's done...

Back home I have a 84 1ton -- dana 60 front and 14 bolt rear that I plan to clean up and put under it. Plan on running 4.88's + currently 4.10's I think.

Have a friend with a 12in lift off his 71 he wants to sell. How close is that to fitting 44's?
Found a 2001 Duramax with just over 100,000mi.
Plan to get a matching 6spd.

Does someone make an adapter for a NP205 to a newer tranny?
Will a Duramax fit without having to fab up everything?

Had a stock 454 ready to rebuild but sold it, looking for decent mileage and don't want to stress out a small block.

Any sites with detailed info?

Thanks