The backspacing in the rotors isn’t available elsewhere, we need the overall height because those numbers are available.
If you’re using the wrong rotor per the writeup (I’m leaning this way because an aftermarket 2pc gs350 F sport rotor would be a rare thing to find) the solution is to offset the caliper accordingly relative to the rotor you chose. A few people have used isf and RCF rotors with 17z and 18z calipers but that was not the intended design for the bracket and requires, for lack of a better term, “customizing”.
