15 in Wheels over 13 inch brakes

I was thinking about just moving the lip out further with a 2.25 in backspace , I have seen these same wheels on SVT's and was wondering how it was done? Maybe with a different caliper that sits closer to rotor, smaller piston maybe.Thanks anyhow Steve
 
Not in a million years. My brakes on my Cobra are 13" and stock rims were 17". You could barely get your finger between the caliper and the rim. Yes the rotor is 13", but the caliper has to go on top of the rotor so it ends up being roughly 15-16" of clearance needed.
 
I'm not doubting you(I don't know it all by any means). Don't stang rims come with like 24mm backspacing? Assuming that is true wouldn't the backspacing be like 54mm, or the rims stick way out?

I along with plenty of people use Weld Pro Stars on the front of their Cobras w/ stock brakes. Granted these are 15x3.5 wheels and the OP didn't say what wheels but 15" ones.