just bought a 3'' procomp complete kit on ebay for 189 bucks. thought that was a pretty darn sweet deal. anyway i was wandering it does not come with a drop diff kit, is this something i will definantly need? and if so do i need it as soon as i put on the lift or can it wait a while? thanks a lot hope i made a good choice here and if anyone else is interested they have more on there for the same $$ and they are brand spamkin new too!