Wouldn't installing 9" wheels instead of stock 7.5" make it fall into Street Touring category (STX)?
Quote from SCCA Solo Rules Book, Street category allowances:
13.4 WHEELS
Any type wheel may be used provided it complies with the following:
A. It is the same width as standard and as installed it does not have an offset more than ±7.00 mm (±0.275”) from a standard wheel for the car.
The resultant change in track dimensions is allowed.
B. Wheel (rim) diameter may be increased or decreased 1” from the standard part. This change may be applied to the front, rear, or both axles.
Street Touring category allowances:
14.4 WHEELS
Any wheels are allowed with widths up to the following (OE wheels exceeding these maximums are not permitted) (in.):
STR (AWD), STS............................................................................... 7.5
STX (AWD)...................................................................................... 8.0
STR (2WD), STX, STH......................................................................... 9.0
STU............................................................................................. 11.0
As for Camaro, I guess, it's less of a boat compared to Charger
