:welcome2:
Rust....
Rust gets everywhere on the classics....Check the Bulkhead, Front Door Pillars, under the door sills, the Foot wells, the outriggers (the angled bits sticking out from the chassis that the body tub is bolted too) the rear cross member (look right up between the rear bumber and boot floor).
Check condition of the oil, look under the Oil filler cap for signs of mayonasse, sniff the expansion tank for smells of exhaust gas.
Check for free play in the steering, check condition of the steering box for leaks.
The Gearbox is pretty bullet proof, but ensure it changes smoothly and kicks down readily and swiftly without seeming like it is bogging down.
Check the operation of the Transfer Box, she should pull well, the 3.9 really did suit the Classic, very pokey when needed.
If it is a single point LPG, make sure you don't run the tank empty as they do tend to backfire and knacker the MAF - fit a Fart Flap (LPG Backfire valve to protect the MAF)
My 1993 Classic on LPG was a fantastic car, although she looked like a dog, she was one of the best Rangies I have had and I would still have her today if some like scrout hadn't nicked it and burnt it out!!!!!
But Rust is the biggest killer.....
Also if it has EAS, check the suspension bags, they could be getting old.....