That's a part number, you want the code instead. Look on the side of the gear box (the small end of the tranny) for an embossed code of two letters and numbers on a flat area. This is what you need to know. It will start with like AH and then the serial number. You just need to know the letters.

Go to Mike's site he has the codes listed as what gears they have.

www.performanceghia.com