I have a 2000 Chevy express Van 1500 and I would like to get a leveling kit about 2 1/2 to 3 inches lift in the front. And I don't know where to get the kids from more how to find them where do I go and what can I use it and also how big of a tire can I go without rubbing could I go 2 sizes up or should I go only go 1 size up. Oh and it's all stock right now. Thanks