My pants get tight when you talk tough.
If you want to write up an official buyer's guide, I will sticky it.
Coolant, any car that old can be in need of new hoses. The coolant manifold on that engine is plastic/poli and last
about 4 years, but are cheap and easy to replace.
Radiators last around 6 years and they are a little pricey but easy to replace. What I would watch for is the heater core! Make sure you get heat blowing Hot on both sides (left and right) and make sure the carpet is dry with no signs of
coolant in the floor boards.
On the suspension, the front a-arms are what wear out. The rear never seam to go. The air spring more often than not out last the strut/shock. I see a lot of LR3's and Sport's that drive like boats because the shocks/struts are gown. Make sure it corners stiff.
The only other thing to watch for are the differentials. The pinion bearings go out. You should get no road noise with new tires, so if you can hear a low growl at parking lot speed that gets louder as speed increase it may have a diff problem. Sounds the same for wheel bearings.
I have seen the engines and transmissions get 250k+ miles with no problems as long as you don't over heat them or run them low on oil. Really damn good truck.
Email ramblings from a tech that I trust:
Look . Do this before you do anything with this toilet. Get it on flat level surface/jack it up so you can get at the bottom of the transmission. Remove 4 8mm head bolts holding the heat shield to the bottom of the trans. Get that shield out of your way and look for a hex head fill plug on the right side of the trans behind the shift cable and mechanism. Start the car and pull that plug out of the side of the transmission case. Pump trans fluid into that hole with the engine running till trans fluid is running out the hole and put the plug back in. It's worth a shot so you don't totally loose your ass here. Or get some mechanic to do it for you. But follow those instructions to the T.. Engine running/ fill till fluid runs out that hole.