O.k I have a 15x7 aluminum rims off a 3rd gen Firebird and I want to mount slicks to it and rum them on my TTA at the track. Will a 26x8.5 M/T slick fit? Would I need any backspacing? If so how much. I also seen list a 26x9 from Hoosier. Any help on this would be great as this is my first time getting slicks and all and not sure what to get. Thanks, Jason