15x10 Billet Specialties Fitment

Anyone tried billet specialties street lites on the S550? I have a 88 coupe that has 15x10 6.5" bs street lites on the back with 275/60r15 mt pro radials. trying to figure out if they would fit on the back of my 15 GT.

Not unless you change the rear brakes to an aftermarket drag brake setup. Not sure on the backspacing.

Wont fit. Will stick out 2-3" past fender. Just tried installing 15x10 Welds with 7.5 BS. Have 15x9's now with 6.5 BS