On the question of the 4x4 - on a Ford it gets you away from the Twin I-beam front end - a source of front end camber problems that can lead to uneven tire wear.
Chev and Dodge use unequal length A-arm front ends and not a problem.
Also you may need to consider if you want to put up with all the extra weight of the transfer case, front axle and driveshaft.
Finally, all you get with 4WD is 100yards further in when you get stuck LOL.
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