From what i've read, aluminum 15's won't fit. You're saying those will.. Hey, try em and find out.
I've got steel 15's with 4" backspace on mine and they're pretty darn close. I'm sure aluminum will be even closer, if they fit at all. Even with an extra inch BS. Why not just run steelies? They're cheaper anyways.
07 Unlimited Rubicon Rescue Green
37 IROKS, 5.38 Gears, 6Spd, 3.5" lift Poison Spyder front bumper, 8k XRC winch, Smittybilt Atlas rear bumper, Poison Spyder fender flares, Rigid Fog lights, Superchips tuner, Hydro assist, HID projector headlights, HD/custom tie rod & drag link, sound system, custom tree damage.