Mechanical stuff is fairly easy to find and pretty robust so don't let a tired engine or gearbox put you off - the real problem (as with and older vehicle) is rust. It can be anywhere particularly around the lower panels (inside and out), floors over the box sections, cab floor, spring hangers, inner and outer door steps, gutters and make sure you have a good look under the peak above the windscreen - we have a saying on here 'Don't look up' that refers to the mess you might find under there. There should be a nice seem where the screen surround and the inner roof section meets so study it carefully as it is an awkward repair.
All this sounds dreadful but there are plenty of other vehicles that suffer far worse and we are blessed with a panel guru that produces all the repair sections you should need - by hand. Martin Maltas is his name and I can say from experience the panels fit perfectly. Go for the best possible body work you can and don't be distracted by all the nice nic-nacs that make the interior so appealing - just make sure it's solid and not full of filler unless you enjoy welding