The only difference in the rough country 4" an 6" lifts is the add a leaf in the rear. That's the rcx lift set at 4". The brackets in the front drop everything 5.25". You actually lower the truck from stock settings at the torsion bars to get 4" of lift. You crank it just slightly for 6".
So if you want the lift now, but can't get tires, leave the aal out set the front level with the rear an drive it. When you're ready for tires throw the aal in the rear crank the front level an throw on your 35's...
Alright thanks a lot for the advice! My buddy's dad works for Michelin so I am just waiting to hear back if he can get me the discount on my tires and then ill make my decision!