I would try a 24 tooth pinion. Not sure what will fit on the mount you have johnny. That should be a good starting point.

Thanks Leroy. I am using the stock mount. Anyone know what the max size pinion is that you can use on the stock mount? If the 24t pinion woldn't fit on the stock one, would it fit on the G-Maxx motor mount?
Thanks.

The gorilla maxx mount has alot of adjustment. I have ran a 24 with a 66 on the gmaxx mount. It could take a little more. ;)