On a scale of 1-10, how hard is it to do yourself? I've got a new set of 4.3 gears that I'd like to install into a blown N/A LSD diff and get it rebuilt as cheap as possible. Suprise, suprise; Im a 2nd gen owner, lol. I've seen some diagrams and what not, but who has done it themselves, or how much would you expect a shop to charge for it?