Offset spring hangers and shackles....

71’ scamp is the car im referring to. I dont want to cut the frame rails, so i started looking at the 3/4in offset hanger kits. Im putting a different rear under the car, so moving the spring perches was in my plan anywho. Ive got the wheel and tire from my other cars to use, thats why i want to use the 15x10 and that tire.

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The odds of a 15x10 from another car having the right backspace to work on that scamp with a 275/60/15 is slim and next to none. Unless you’re going to do a custom width rear axle just to fit those wheels. Which seems like a lot of work to do just so you can run the wrong size rims with the tires you want.

Even with the offset shackles a 275/60/15 is the upper limit for what will fit on a Scamp without cutting anything. You’d be way better off putting those 275’s on a 15x8 or 15x9.