Welcome!!!!!
Nice truck, and it sounds like you got a great deal.
Might I suggest taking a really close look at the rocker panels, front fender cups, lower rear cab and the inner kick panel areas for rust, before you take it down and have it painted.
It looks solid from the one picture, but there's a lot of little areas to develop rust. You'll probably want to know about them before your new paint starts to bubble up if any rust is present!
Look forward to more pictures