NORCAR - home of the Halloween Classic - has a similar solution they call Gate Spec. Everyone must run the same motor, battery, pinion, spur and tire. The ESC, Chassis and Body are open -- but the new Protoform 1/12th ferrari is encouraged.
Class: 1/12 scale “Gate Spec”
Motor/Rotor: Speed Passion 21.5 (P/N 138215V3)
ESC: Any ROAR approved non-timing ESC in its approved “Blinky” mode.
Battery: Turnigy “A-Spec” 6000 or 5600 mah 1s.
Gearing: 45t pinion and 78t spur.
Tires/Rims: CRC Spec pre-trued.
Body: Open 1/12
Maximum Battery Voltage: 4.20v
Minimum Ground Clearance: 3mm
Minimum Weight: 730g
Maximum Width: 172mm
http://www.norcarracing.com/index.ph..._Classes-Rules