Check your frame, body will either be very good or very bad, if it looks good and a magnet sticks to it then thats awesome, if it doesnt then prepare for lots and lots of body work.
Take a hammer of any sort and pound on the frame, if the hammer goes through then walk away, most frame jobs need the body off to do a decent job and if your body is rough you might as well look for a newer tub off a YJ or aftermarket steel.
If the motor runs and doesnt sound like a bag of hammers, and you can row it through all the gears, call it good.
Thats a major stuff, your temp and gas guage will probably not work, your wiper linkage will also probably be pretty sloppy too.