I believe that the guys up in Washington State used to run ITS. I was not aware that the dash was an issue but you might talk with the SCCA tech people about it. Since you are not concerned with running for points, they may let that slide. It is worth a shot. On the other hand, you could ask the region to accept the Spec 944 regional class for you. I can put you in touch with the Arizona SCCA guys that race in the regional class there. I see no reason that your region would not welcome you to be the first car in the class in their region. A car is a car, especially these days.
When NASA is at the track close to you, go out and race with them for sure, though. That is where you will be able to find more cars, going forward, to race with.
Have fun and get faster. Let me know if you want to contact the Arizona guys.
Big Dog