ill save u a search these are all known to be valver bogeys
Headgaskets go so really check coolant for signs and a recent change, wheel bearings howl after surprisingly little mileage, cambelts snap so make sure its recent or deduct cost to fit when buying(excess of £300), rot occurs in arches and less frequently tailgates (rest ok), play in steering could be moderate (track arms £100 aside fitted) or v.pricy (power rack £400-£500 fitted), gearboxes aint too tough and prone to leaking oil, ball joints (every two years if big wheels fitted), seizing rear calipers, all engine mounts are soft especially dogbone Gbox link, the build isnt the best (in a reno way), bonnets get bad stone chips but are well treated for rust, manifolds can crack but its fairly rare, they all use a bit of oil but exhaust should not have blue smoke anyway.
there are others e.g leaky sunroof/aeriel, oil guages take the huff every so often, but if all is sound from above list its probably been looked after. They do take a little pampering and looking after, and can be expensive if u r unable to do work yourself, but everybody who has them loves them, and they have a surprising amount of street cred, especially willys.