I got a flat and the tires are just about ready to crack down and break they have been sitting so long. The car is getting a new drivetrain... motor, tranny, and rear end and may as well get new wheels and tires to go with the other goodies! This is my question: The motor is gonna put down at least 450HP to the ground, so I need help sticking on the street. How wide can I go in the rear end? I want to run 18" gunmetal Saleen wheels. I just gotta get the rubber to match the metal. What do you think?