You say you are good with maintenance. Your truck is getting older and you are going to work it harder. Your maintenance should go from good to better. Spend some extra time on the cooling system, making sure the system is flushed, the hoses and belts are good, etc. Shocks? Maybe, but do you have any worn steering parts? Bearings and tires OK?
Get close up and have a good look at everything. In my mind a sweet running old truck can be like an old friend. Take care of it's heightened needs and you will still be friends.