I am building a vintage roadster with a vintage engine. Its not a V8 but will run in XO. Does that make mine not a real vintage car. I also have a Indy V8 engine that will rev to 11,000 and make lots of power, and monster power with a turbo that will also go in my car for E class. Its a V8 so Would you consider that a real hot rod engine. There is a glut of old F1 engines on the market and its only a matter of time before they show up on the salt. With their air actuated valves and other things some records will fall. All you have to do is look at some of the hill climb events to see these motors in action. A $75k Hemi Chevy is surely not vintage, and thats legal to run in AA, so why should their be a ban on motorcycle engines in smaller classes. Mike, I respect your view on what should be in a vintage body and your interpretation of a Hot Rod, and your accomplishments speak for them self. But my interpretation is a little different on what is a hot rod. My vote is let them run.