[earl84]

I'm sure others that are smarter than me will chime in before long. Do you plan on changing any seals, gaskets, parts before installing? I changed the rear main seal since it was so easy to get to. New oil pump, oil pan gasket, valve cover gasket, timing chain set, timing cover gasket, valve seals, basically anything I could get to without taking off the intake or heads. Painted it Detroit Diesel green, I like it. It's easy when it's not installed.
Good luck. Take some pics. I have some finished pics, but not in progress pics.
Mine was installed into a 66 C20, not a 84 Jimmy, so I can only offer general advice that I'm sure you already know.