511
The L pattern 3-bolt 700 series Saginaw, built by Howe on your box, in 12:1, 14:1 or 17.5:1. Howe's site points Jeep YJ and TJ owners (and the Jeep Speed class) to this part number.
The asterisk on Howe's price list means you provide the box, new or reman, and Howe builds it up for you. Howe sets its Saginaw boxes up to stop internally when the ram and spindle stop, so you'll mark the box for internal stops using Howe's instructions and leave the pitman arm on afterward. Howe also says it builds with all-new, zero-mile parts, nothing remanufactured.
Howe Performance part number 511.