Not a tough math problem, 36 inch tires fit fine with a 4 inch in all but the most severe rock crawling
- 4 inch lift front springs from any company, I have used both Tough Country and Skyjacker Softride, I like the Softride better, not as stiff, let the shock control the axle not the spring
- A way to get caster back. With a 4 inch, you can use 4 degree C-bushings to roll the axle back, more than that you need to lower the rear mount of the radius arms.
- Track arm drop bracket, or adjustable track bar. I made my own because I wanted it centered exactly
- Drop pitman arm, not required, but it lets the center link live a much happier life
- Shocks to match lift, Tough Country makes a good inexpensive set of gas shocks
That's it up front
Then if you are happy with your rear springs, swap the stock blocks for 4 inch F250 blocks, or get an add a leaf to get you where you need to be. If your springs are shot, go with a local spring shop to match the rear to the front, it's cheaper than buying a full lift spring set.
That's about it. Pretty cheap in the long run
Here is mine with 33's, I ran 35 inch Mud Terrains, 35 inch Gumbo Mudders and 36 inch Swampers on it over the years. I have done the same with our 76 with a 390, a customers 78 with a 400, and a couple of Broncos