Narrowed Rear end questions

The 7.5" backspace on a 10" wheel is what my Duster has on it, mini tubbed with the springs relocated to the frame rail. If you want to run a 4.5" backspace wheel you'll need to shorten the rear 3" on each side. 29.5/11.5 M/T slicks were tight on the inside of mine. I rolled the outer fender lip and pushed the quarters out a little and had to trim the front and rear wheel opening. It's really better to measure everything on your car though. Just taking mine or anyone elses word for it could lead to a costly mistake. I also had Wilwood rear disc on it which pushed the wheel out another 1/2" so measure everything first, if you must, get a junker 7.25 rear to bolt in there for now so it can sit on all fours and keep the HOA nazis off you ***.