[NHRA1877]

As far as i know i have a 1st gen rear end. I am buying new wheels very soon and just found out that the wheels i am getting (weld magnum 2.0) only come in 4 or 5 inch backspacing for a 15x8 wheel

For guys running a 30x9 hoosier radial, what backspace are you running with a Weld wheel? 4 or 5? and im assuming 15x8?

thanks!!