Check this out..

[tinkerer]

Found this on Ebay. Thought it was interesting. Wonder if its any good???

http://www.ebay.com/itm/5500E-Electronic-Engine-Speed-Controller-governor-generator-Genset-parts-/260975867770?pt=LH_DefaultDomain_0&hash=item3cc35fb77a

Ben

[Ronmar]

Yep, All you will need is a flywheel ring gear, the pickup to read RPM from the passing teeth of the ring gear and the actuator servomotor to connect to the fuel rack...  Only another $200-$300 in hardware if your engine already has a ring gear:)