GMC is totally correct Doc. You may run points,magneto glow plug, hot bulb* or 2009 model digital plasma nuclear etc ignition system if you want in ANY class as long as it does not change the original external look. (on the Kawasaki W1 650 I have, the Boyer electronic is hidden inside the vacant Magneto ,where else....) The veteran/vintage classes in Road racing are very good at hiding their ultra modern but very legal electronics. Tim
* Hot bulb had that on my old Lanz bulldog single cylinder tractor, you heated an external knob on the bulb with a blow torch ,this transfered the heat to help the cold motor start. Once heated till glowing bright red place explosive cartridge in starting slot close and seek ear protection, press trigger. the resulting rapid expansion of gasses would ...hopefully turn the massive flywheels over in the correct direction as yes it could start up backwards ... enough to have the....14.5 litre single

start and then run as a diesel. Normal operation of tractor 520 rpm... and did it vibrate!!!!!!