12 bolt rear end
i'm guessing you have an automatic car? they are pretty good at keeping the 10 bolts alive if this is the case, i would just run it untill it blows. it will hold more power with an auto than a 6 speed car will.
moser engineering also makes a 12 bolt rear end (have on in mine). they are notorious for gear whine for a selected few, although mine is pretty damn quiet. the price of them and the lead time is much less than strange, especially the lead time.
i got mine with the heavy-duty eaton posi, 33 spline axles and TA cover from speed inc.
whatever you do, get it shipped to a business due to the extreme shipping discounts they recieve (68% discount to be shipped to my work instead of my house). this is beacuse you probably dont have a forklift at your house and they will have to send a truck with a lift gate instead of a standard one.

