OK you ITAC guys asked, but you really don't get paid enough...

Be proactive about classing cars. If it's a sporty car, class it.
Plan a schedule to analyze each IT rule in order, with an attitude of bringing it "up to date". Probably take a whole year, do it every 5 five years, at minimum.
Use SCCA resources to compose a survey just for IT drivers. Find the demographic if you don't already know it and target it. Prepare an IT "brochure".
SCCA sells mailing lists, maybe we need to buy some from other sources.
Get SCCA to help publicize IT. The results in SportsCar if any, seldom have write-ups or pictures. If they don't pay for event write-ups already, propose they do.
How about an IT report in SportsCar? Or a least an IT "state of the union" report. Since Fastrack is only online now, IT exposure has been reduced.
The Divisional reports have too much to cover. IT needs it's own report/reporters.
I know IT is a regional class but a little national attention could increase entrys.

The wing question may be kind of off topic but, I think wheel size would discourage a young driver more than no wings.