Are you targeting any index or racing class? If so in my neck of the woods tire size is a condition to many bracket type competitions. We have a "King Street" class that only allows 10.5" slick. Or I believe a 12" DOT. The last I heard a car out of one of the bigger garages got under 8 sec. And that's fully street legal. With some street drivetime to qualify At 3100lb min.
I don't recall all the rules. But it's not run what you brung. Lol.
