I have available a genuine original rebuilt differential for 289 and 427 Shelby Cobras with 3.31 gears which I've had hanging around for an easy swap. Needless to say, these are extremely hard to find and are unique to the Cobras......and this one has very low time on it. I don't really need an entire second complete differential, but like the ratio as a spare, so I will be pulling out the ring and pinion if and before it sells (new gears of various ratio are readily available). All the bearings and seals are new and stay with the unit, as does the differential "spool". The spool is nice and tight and was never disassembled. The rear upper mounts are included and the metalastic bushing are brand new. The front mount is not included. The unit has the threaded hole to accomodate the competition
oil cooler inlet. Taking offers in excess of the cost of a repro. Shipping extra.