Glad it worked out for you, Jeff. I experience the same thing in auto-x from time to time, but it's mostly caused by late braking into a tight apex. For some reason, the rear brakes on my ERA rear susp come on a little sooner than I would like....balance bar seems adjusted as prescribed in the manual, but in heavy braking, the rear definitely has a high bias...
Always something...
But I'm glad you/the car/fellow motorist are OK and you might want to take that beast out to one or two of the Philly area auto-x events...
Edit: Pat yourself on the back for making a sticky street tire choice.
- Allen.