Will a winlite 15x10 single beadlock with 7.5 backspacing have a good fitment as in with the fender clearance. I have 17x10 winlites now but those are 7.625 backspacing and fit well. Brakes (TBM brakes) and knuckle (zero in racing) not worried about those concerns.
I donāt see the option for rears on TBM website but I am running these tbm rears in my s550,
https://billetproshop.com/products/tbm-rear-drag-race-brake-kit-15-21-mustang-s550-reusing-factory-knuckles