Dana in a dart

Got the Dana in the dart moved springs in 3 inch’s on both sides the wheel tire combo is just for mock up
15x10 3.5 offset 275 tire. I can go bigger and in the past I trimmed the wheel well lip but I don’t want to do that Rim/tire combo suggestions? Can I move the springs back an inch if I drill a hole in the perch? Any info would be great thanks

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