As a driver of an S car I'm not opposed to your car being in our run group, but there are other considerations:

1. R/S/A/7 is the "standard" SEDiv run group.

2. A 300 horse Mustang should be far more capable and turn faster lap times than the best R and S cars. This makes comparing actual lap times difficult vs. theoretical ones.

3. While the actual lap times are comparable to or slower than the times of a good S or R car, it's the A and 7 guys who may have the most concern.