Drew is right about using used gears, better off to buy a good set of Richmonds to be sure of proper seating & mesh. I was having my rear end built last year & the guy that built it told me that if I used a used gear he would not garantee that the rear end would not howl. Decided to get new ones & do it right the first time. Sometimes you can get lucky, but why take the chance? It would suck to build a rear end only to have to do it again, PITA to pull out again & time to get work done. DO IT RIGHT!!

Steve