I bought a chassis for my 65 starfire that had this rear on it. It came off of a 65 delta 88 ( I was told). After swapping the chassis's ( I HAD TO EXTEND THE RAILS A LITTLE BIT) I felt the ratio was too high for me, so i swapped it back for the stock 3:23. It worked perfectly well, but was to wound up for me. I don't know the gear ratio's but could find some pic's I have with casting #'s on it if someones interested. Also - inc's. axle and brake back plates. Call 973- 267- 5784. Steve in North Jersey.