Well, that's about it for the mechanical part....
Put the pulleys on the balancer and water pump.
Install new belts on the alternator and A/C compressor. (You only need the alt. one if you had to relocate yours, like I did.)
I discovered that a 3 row radiator and stock flex fan wasn't enough to keep my truck cool.
SO I installed a 4 row radiator (they're huge), a tranny cooler, and a new thermostat and no more overheating using a stock 7 blade clutch fan.
Once that stuff is back on, put the fan shroud back in, leave it loose so you can slide the fan in and on. Get the fan tightened down and put the fan shroud in place and tighten it down as well. Tighten the alternator belt.
Hook up the hoses to the radiator/motor, hook up the battery, and fill the radiator with a 50/50 mix of water and antifreeze and fire your truck back up. In my case it was about a month after I started
Don't run the A/C system yet (I did test it with the motor off to see if the fan was blowing and it was) because you need to take your truck to a shop to have the A/C system properly evacuated and charged
I left the A/C compressor unhooked until I could take the truck to a shop to have the system evacuated and filled. You could probably do this yourself (minus the evacuated part, but it may not work as well.) The shop also tested for leaks and all was good.
This part is not cheap! I think I paid about $90 for the evacuation and charging. But I feel it was worth it. I called several places and some were as high as $120 for both.