It's by no means strictly a track car, but given the shitty mileage I get (7.5 mpg city) I rarely drive it except to the track. Given this, the fact it runs on clean burning e-85 and I'm mafless made me give the exemption a try.
I provided them with a copy of the engine build specs, pics of me at the track showing the white shoepolish #s and doing a smokey burnout, pics of the driveshaft loop, pics of the engine and pics of the interior. I also let them know it was converted to E-85 fuel. The exemption form is in a previous post.
That pretty much did it. Again, it's not a daily driver and having 19,000 miles on the odometer after 4 years helped too.
I have regular insurance on it.