The concept of IT came out of California, to accomplish what Greg describes - affordable racing and a place for aged-out SS cars to live. The Club saw the writing on the wall and got out ahead of the regions by coming up with a standard set of rules for everyone. I was on the committee in NW Region working on our version of the IT rules when the first ITCS trumped our efforts by coming out sort of by surprise.

That RS class (Radial Sedan) that we had in WA/OR actually post-dates IT by just a couple of years. Not surprisingly, there were a lot of people who wanted to be able to play with their cars more, that wanted to run cars too new for IT, or that didn't like some of the specific restrictions of the new rules. Some of the same people worked on that plan and came up with rules that were quite literally just one page. They've morphed over the years, too but RS is still relatively popular in the Northwest, albeit more with ICSCC than with SCCA - which is troubled in that area.

K

PS - there was an issue of SportsCar (from 1983, I think) that featured the new category - "This is IT" If someone could source a backcopy of that mag, it would potentially clear up a lot of controversy about what the Founding Fathers envisioned for the category. I check eBay regularly but everyone should keep their eyes open.