Heh. The Full-Sized Jeep equivalent is spending an amount of time that would have fixed a Chevy outright convincing the kid at the counter that it isn't a Dodge nor a Ford 360; or that it isn't a Chevy 327; or that it's a 350 but a Buick rather than a Chevy; depending on year. (Of course, finding the good auto parts store in your area is rather more than half the battle no matter what you drive.)
Other things to watch out for: Quadra-Tracs that have been run on mix'n'match flea-market tires, said to be hard on the little mystery pit deep inside. Torqueflite automatics that have been run through deep water (until sometime in the early 80s they used the Turbo-Hydra-Matic 400, less prone to this problem than the otherwise splendid TorqueFlite). Overmatched and worn T-5 manual trannies in later versions with the straight 6. Frame cancer in rust-prone parts of the country (remember the vehicle might not have originated in Texas). Leaks -- make sure some of every fluid it owns is on the ground; else check the fluid levels. Crude (as opposed to the occasional well-done) conversion to the small-block Chevy engine.
Superb vehicles if you tie into a good one though; and a harder-used one can still be a good weekend work truck if it is okay on fundamentals and you buy it knowing that it's a beater and intending it for that purpose and steel yourself against opening Pandora's toolbox.
--Joe
PS. Don't forget that the gas gauge should have been labeled "Amusement device only, not intended for gambling purposes."