Is this a real lift kit or a “torsion bar” lift kit? It’s gonna ride horrible of it’s a torsion bar lift. You’ll have no down travel. And you’ll start eating suspension parts, Ball joints, tires, steering end links not to mention sterring will be funkier as the suspension will constantly travel in basically close to fully extended position. I doubt you’ll be able to compensate that much positive camber with a alignment with stock upper arms.
If you’re gonna lift it get a real lift kit or leave it alone. 2.5 inches isn’t gonna do crap for you off road or perform/handle better but it sure will make the truck ride like crap and give you all sort of headaches. Save your money
I’ve done a few torsion bar lifts on friends trucks. I don’t know anyone who was happy with them. They usually had me lift them or go back to stock height.