You should be ok with a 4" lift without having to trim the body. With 14.50 wide tires, you may end up triming the wheel wells any ways. But, you will need to check and make sure that your tires do not rub. I run 12.50's on my '79 and it is a tight fit, but I clear the inside of the wheel well and have no problems with the fronts rubbing when I turn. You may have to off-set the tires to retain your full steering radius. As for who makes the best lift kits, every kit has pro and cons and what the individual buying it wants. Best advice is do some comparisions checks between differant manufactures and see what is included in the kits and go from there. I put a Rancho on my '79 and have been happy with it. The only thing I did not like was the blocks under the rear springs, and I'm replacing the springs and doing away with the blocks.