That's a great idea! We can catch up with the motorcycles and have a lot more open records. Everyone can have a Bonneville record. "Fastest Red Street Roadster", "Fastest 82-87 Camaro (Silver)", "Fastest Mid-Engine (Either Front or Rear) Model A Blown Alcohol Roadster", etc.
FIM has done what SCTA could, maybe should, do. Cut classes. The dropped 50/80cc bikes from the Would Road Racing championships when 50/80cc bikes were replaced by Mopeds on the roads. They dropped 500cc Sidecars from the World RR championship when they became three wheeled formula cars.
Maybe it makes sense to replace flathead/four banger, six cylinder classes with electric classes. Hot rodding was originally about building cars from junk yard parts. When was the last time you saw a T, A, B Ford four in a junk yard? Tesla, Volt, BMW i8, etc should soon be plentiful at big city junk yards. Here in Orange County, CA the Tesla has become the new Toyota Corolla. The other day I shared a left turn lane with three Tesla.
So why not have SCTA electric motor classes? Today electric motors are being swapped into Corvettes, Mustangs, etc.