Visited my suspension and alignment specialists today with the knowledge and results from Sundays event. He frowned at me when he saw the rake I had in the car. We ended up lifting the front to match the back and went with more negative camber in the rear. I taped the sway bar and camber arms where prior contact has occurred. I didn't hear any hits on track or on the way home today so I believe it's resolved. I'll pull the rear tires and take a good look after a few days of trying to cause it to hit.
As a side note I have a video of the second heat. Somehow it's corrupted and I can't get my video editor to import it. When I solve the problem I'll be posting it. Some of the cars passed by my lowly SRT-6 were a Charger SRT-8, Boss 302, Ferrari F12, and others. One I couldn't get by was a full race Subaru STI. Everytime I got close enough to give it a go I made a mistake and went 2 wheels off or similar. Whisper number was 500hp at the wheels for him and I believe it based on how he pulled me on the straights.

Les