I've got a '85 ITB Dodge Daytona. It's not fast (yet!!) but I'm still sorting out the car and the driver.

There is a fast Plymouth TC3 (Steve Hoffman) that races at Summit Point. I talked to a couple of guys who were racing an ITA Shelby Charger at one Summit Point race last year.
There was an ITB Charger 2.2 at Pocono a couple of years ago.

It wasn't quite an IT car, but there was also a F Prod GLH (limited prep) that also raced at Summit Point. It was for sale and I haven't seen it lately.

Bob Clifton