New to me low mileage ISX

[Chamberpains]

I'm dealing with a similar situation with a truck that sat for awhile. A big... huge thing is dont start it. Pull the valve cover and bar the engine over by hand. Check the cams and rollers for rust. Lot rot is awful. Moisture gets in to the engine and rusts things up. Make sure your cams and rollers aren't pitted and rotted. If they are you'll be replacing everything that's rusted. The last thing you want is chunks of rust coming off and going through the engine. Make sure everything looks good and pour some oil all over everything up there before you use the stater to fire it off.

Also before you get to caught up in working the truck you'll probably want address and frame rail rust or oxidation that is starting. Lot rot is awful.