You'll probably need weigh over the rear axle. Lots of truck don't have sufficient such when unloaded. Won't need the clearance your lift kit has and the only thing I'd add it that it raised your CoG which is never good.

One time I ran into this was getting a RWD Jeep (Sixt in LAX didn't have the promised M-Bs) which could barely get up a faIrly-gentle hard-packed dirt road in Joshua Tree NP.

Should also add that unless your tires are all season or winter, the compound used may be a little hard when it's colder so not likely to give you as much traction (not just to get moving but taking turns and braking) in (extreme) cold.