Welcome to the forum, newtbln. Putting in a V8 is a small part of the total picture. Because of a Jeeps short wheel base, you will need to stretch out your wheelbase, if you are wanting to use it for climbing. Otherwise, you will sit on your back tires, and do what is called, "the bunny hop". If you can crab a V8, that is already fuel injected, and get all the wire harness that goes with it, includeing the ECM, it will be less difficult. You will also need to upgrade your axles, ex. D60 for steering, GM 14 bolt, for the rear. Get a gear driven t-case, like Stak, or Atlas, go with heavier tranny, and so forth. It is expensive, but not so bad, if you can do the work yourself.