My "T" is a little gutless!

[rotorwrench]

It may need a ring job overhaul and/or valve resurface. If the bearings are getting sloppy then it could be full overhaul time. Model Ts respond well to a high compression head but they need to be in fairly good condition to start out in that direction. A Ruckstell conversion will give it the extra ratio but it would likely need Rocky Mountain rear brakes for that kind of go fast.