Okay so I have the Ford M-2300-k brake kit on my 1990 gt and wa wondering if this combo rubbed the front control arm at full lock when lowered 1.5inches. Also, if anyone can teach me, why would Ford go with different offsets/backspacing with the rear M179's and not just use the R58 on the rear as well?

Reason I'm asking is Im looking for new wheels and am basing my sizes off of what Ford recommended for the M-2300-K kit... the R58/M179 combo they use to sell.

Any info is appreciated! Im looking at 17x9 RPF1's as my first choice.