Read . Research. This is not a quick one line answer to a thread like this, you need to understand it.
Plenty of threads out there . Its been done countless times on
and Piraet4x4 and documented page by page on countless threads. Just read and read. When you get to a very specific question, then post, something like, will a SRW 14b with dually hubs allow the calipers to clear leaves or will I have to link the rear ? something like that.
obviously plate the frame Mid and Front,
and inner box area.
Consider Booster and Master upgrades for the bigger brakes.
1 tons are heavy so you will need to beef up the rear leaf mounts and use quality front suspension components.
Other than that, its up to you to choose. 3 link the front, keep leaves in the rear. Depending on the 60 front you choose you might need coilovers . There are so many variables its silly.
Final tire size, budget, ability to fab, etc