what else do i need?
should i go with the genuine gm or the performance 3.73s?
should i get the master install kit to go with it?
and also, should i get the 7.5" or 8.5"?
everything is stock on my rear end. and also where would be a good place to order the gears from?
i'm not installing them myself but want to make sure i have everything i need so the installer doesn't run into any problems..

