I just built up a new 10 bolt rear end for my bird and have a stock 9 bolt rear end with the 277 series 2 posi. After pulling off the diff cover, there are plenty of metal shavings. Regardless, I have a set of rear axles if anyone needs it. Make me an offer. If you want the rest of the rear end (minus the brakes), take it with. Best offer wins. Its either that or junking the parts.