74, maybe these will help; http://www.ogren-engineering.com/ite...an-racing.html

There is a break for engine size and the rest is pretty open.
More so than ITE that was based upon World Challenge cars and not really based at all on anything other than not fitting any other IT rules.
We did have a new guy with a car that had no fire system and they(**** nice guys in tech****) fit him into the ITE class for that reason. HTH, MM