69ergt, I used the white 23 tooth speedo gear. I got it from Steeda because Mustangs Unlimited was out of stock. They raped me in shipping charges. Like $8 to ship a little plastic gear the size of your thumb

The gear runs about $20+ s/h.
Good luck!
BTW, my 4.56's are on their way to me, hehe. Can't wait.
[This message has been edited by T_Bone (edited 04-13-2001).]