Its just my opinion but I would go get some ford leveling keys some Z71 coil springs with about 2" spacers for the rear. You can go 3 full inches of lift in the front without stressing anything. Get some bilstein 5100's shocks all the way around and throw on a set of 285/75 r16's (if you have 16 inch wheels). You will be able to handle a LOT with this setup and its cheap. If money is not an option get a 6" lift throw on some 35's but then you should change your gearing. $$$$$$$ on that setup. Like I said, just my opinion.