Pro touring fox body

[andrelossem]

I would like to Know how hard it's going to be to get 285/35/18fr. and 315/35/18 rear tires on my 90 LX fox body.I have the MM k-member and rev.. set a-arms. For the rear I'm going with Cortex watts link and torque arm. What rim size in width and help with off set. Thanks !!!!!!!!!

408 LQ9 L92 heads
4l80 trans.
8.8 rear stock gears.