Also it should be noted that you stated that you wanted 4"s of lift. A basic spring over is going to net you closer to 6" of lift. Just food for thought. Your biggest hurdle is as Mike and plug pointed out your axles and budget.
Edit: I thought I would add a few things to think about to mikes list so this is in addition too.
1) the 80 springs: these are 1 1/2 wide and short, allot of the folks swap in Scout II or other springs, 2 1/2 Chevy springs are a also a very good and popular choice. If you choose to stay spring under a 4" lift could be achieved by changing spring and swapping in Scout II running gear. This has been done many times
2) as Mike pointed out, your steering with need to be addressed at both the axle and the method in which it is applied to the axle. Also a consideration in axle choice I.e. High steer, dom tie rods, 1 ton tie rod ends, hydro assist. All become options with the proper axle swap
3) brakes, with larger tires and what not comes the need for better larger brakes. Again the proper axle choice will help you solve this riddle.
4) gears, also touching on what Mike said if your motor config is a 152, 3 speed Dana 18 t-case then gears become all the more important when increasing tire size. You mentioned that you have the mechanical skills to perform all of this so I am sure this is information that you already know but I would be remiss if I didn't point it out. A
lastly a question. Have you built a vehicle before? If so that you are fully aware of how budgets explode and nothing turns out the way you expected it too. If not please check this out.
build rules