Exactly. And all this talk about not being able to police the old cars? Come on. They don't get much older than the Prod cars. Plus, IT cars are far less likely to release the toxic Lucas Smoke on track, thereby making it safer for the workers! [/b]
Yes, but lets look at the facts.

Prod is a much different animal. Each car has different allowances. A billet crank for this one, a different throttle body for that. All cars on Prod have been selected because the specs are either known, or are mandated by the club.

IT cars, on the other hand, were often added early on when the "no guarantee" clause really was the mantra. The CRB (at the time it was called something else) wasn't overly concerned with the scrutineer-ability of every car added to the ITCS. There are cars in IT that have, shall we say, dubious specifications. Certain British cars come to mind, from small manufacturers, who changed cams several times during the year, depending on which source had some at the right price. Which cam is in the service manual? Maybe someone knows for sure, but it does get sticky.

So, there ARE issues when it comes to making IT a Runoffs eligible category. Heck, right now it's an issue, but it hasn't reared it's head. The CRB is rightly concerned (I think) with the potential temptation that would exist for a less than up and up competitor to "create" a killer obscure car, win the championship, based on non existant or conflicting specs.

Is it a deal breaker? No, but it can't be overlooked, and it isn't easy.