Right now I'm running a 2 1/2" spring lift in the factory spring under configuration. My tires are 33x12.50 and everything will "just" manage to stuff the wheel wells. I would like to go to 35's when I do my gear change and figure I will need a total of about 4" of lift to be able to stuff the 35's without any interference. Rather than buy a new lift what I would "like" to do is combine my current 2 1/2" springs with some factory leaves to achieve my 4". Is this feasible and if so what particular leaves should I be using from the factory packs? If I remember corrrectly the fronts have 7 and the rears 5? I don't really want to go SOA because that has it's own set of problems and I don't want to end up too tall, which also has it's drawbacks.