there is no min numbers or tire size its just daily driven streetlegal cars, the gto side is full but i think there a few spots left on the mustang side i will get with the promoter and see if i can get u on the list most likely if the mustang side gets full there will be alternates as there was last year cause most a lot of competiters didnt show, there is no class and its mostly grudge matches ill pm you more info...