RE: Clutchbell ?
It depends on how your gears line up, you need 100% contact-preferrably in the middle of your clutch bell. I have 3 hurricanes and have ran a 13 tooth all the way up to a 20 tooth, and never messed with the hight. Just make sure you purchase a "hardened vented racing clutch bell" if you have the steel spur gears, the other ones strip too easy.