For your first time out try a rental out and see if it's for you. If you like it talk to them at the rental shop. Most places unload them at the end of the season cheap enough.
My 96 with the 7.3 has 345,000 on it and the majority of those miles have been hard miles. As long as the batteries are strong, glow plug relay, and glow plugs are good you shouldn't have to many issues. If any of these are bad and it's cold forget it. The glow plugs are a pia to change and gets...
The aluminum radiators are a crap shoot. Some are great and others are nothing but problems. Avoid three row for sure. I would lean to factory myself. For the cost and considering the original got you 160,000.
Change the thermostat and hoses while your at it.
Also with that mileage the heater...
Nice truck. I have a 96 single cab though. 35's fit under these trucks with no mods. Still leaves plenty of room in the wheel well.
One word of advice. Make sure you have a large transmission cooler and change tranny fluid and filter every 15-20,000. Mine loved to eat transmissions, but In her...
One of those emergency space blankets is a good thing to have. Takes up little space and can use it for treating shock. If its one of the shiny ones might help with signaling for help as well. Depending how far you are from treatment you venture a traumatic first aid class is a good thing to have.