Depends on how far you want to go with it.
On my obs, I ran 5200 lb front coils, and could barely fit 33x12.5s. This was with a 9" wide -12 offset rim. The tread was very close to the rear corner of the fender when turning on flat ground and if there was any suspension flex, it would make contact. With a factory 2" rear block, b code SD springs, and velvet ride shackles my rear end was approx 1 1/2" higher than the front. However it looked more level than a "leveled" pickup that often looks nose high (to me).
What size is the factory rear block in the doner? And front spring rate?
With your body lift, you'll have extra room. If you want to keep it, 35's may just work with a stock spring and maybe a small bottom coil spacer. If so, no drop brackets will be needed.
If removing the body lift, you'll definitely need 2.5" leveling coils (or spacers), adjustable track bar, and either a 3-link setup or arm drop brackets.
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