I'm not sure how long they will last as far as street mileage. They are DOT approved, but they also state 'For Competition Events Only' in fine print on the tire. So they are so soft that if you drive for a thousand miles with the alignment off, you'd most likely see a serious effect on treadlife.
Tread is not that important on a road race car, the tire grips better when it's a slick. But on the street, that's useless.
Also check out
www.tiresdirect.net. Sorry, can't help out with fitment I've only run a 275 width.
I'd probably stick to a 295/305 with a 10" wheel.