18" wheels
I just took these yesterday because of this discussion.
17x8 Cobra R w/ 5.72 backspace
With no spacers in front, there looks to be about 1/4 to 3/8" clearance wheel to tie rod end.
I also recall my other mustang 17x8 wheels fit with no issues, I believe that type was on Claire's car too. Must just be a bullit thing!