Diesel Bombers - Hello, I am new here..

Hello, My name is Darrel.. I am from Central Oregon, I have a 1985 6.2l diesel GMC 3/4 4x4... she is pretty old but she still has the original motor and tranny and she still runs.. She is just getting tired. she was my dad's truck.. I got her after my dad passed away in 94.. I was just a kid then and didn't even know how to work on her.. now I am about to replace the motor with a 6.5l turbo diesel out of a 94 chevy.. and I would like to get a nv4500 behind it.. but that's when I can find one at a decent price... I also am working on a friends truck its a 1999 dodge ram 3500 diesel cummins 4x4.. I will try to post some picks of my jimmy when I can...