Ohhh man I could write a book. CLIFFS:
-Built from 1962 to 1991. Parts are largely interchangeable.
-RUST. RUST RUST RUST RUST RUST.
-12MPG on a good day.
-Later models had the 360 V8 with complicated, failure-prone rat's nest of emissions control vacuum lines. Likely won't be functional on anything you buy.
-Full-time 4WD (Quadratrac) is complicated. Part-time 4WD is bulletproof.
-Built from a mish-mash of ChryCo, GM and Ford parts.
The Grand Wagoneer was the high-dollar super-luxury version of the full-size Cherokee. It was the Range Rover before Range Rovers became status symbols. Luxurious, complex, heavy. Still beloved in places like Nantucket.
This guy sells fully restored versions for $50,000: