Actuall, not to quibble with you, but S cars have gone 39 at RA before, and I think the A track record is 42 or so.
Bottom line is, and I think we agree, SCCA's present classifications system doesn't really give you a "good" place to race. That I totally agree with but for your specific car -- a Cobra R -- hard to know how to fix it. There just aren't enough cars like that for an easy fix.
An ITR V8 Mustang on the other hand....well, if that goes through, you may end up racing in one of the largest classes we have.