how can i get prostars with 4.5 backspace to fit?

i was wondering if prostars with 4.5 backspace will fit , is there a way to make them?

What size (width) Pro-Stars. You need a 5.5" BS for a 15x8" wheel. There is no way to make a 4.5" BS fit under the fender, unless you had the rear axle assembly narrowed.... or got the narrower rear axle assembly from a 3rd Gen.