i got a 1990 gmc jimmy on 33's with a 3inch lift right now. i want to get a 8 inch lift, but iam not sure what type i should get , any ideas? i dont know if i should get like 4inch blocks and 4inch leafs or what, if i get too much leafs will i lose flex?? i got 10 bolt in front and rear, i want like 38s but im not sure if my axles can haddle that much ?? after i get my 8inch lift and tires what else do i need to complete my lift, transfer case lowering?? longer drive shafts??