That I'm aware of, rake is present on all JKs. So many factors can play into your measurements. As an example, most, if not all JKs lean depending on how much fuel is in them. Depending on what side you measure from and how much it's leaning at the time, you could get a different measurement. I honestly wouldn't overthink it. If you want a leveling kit, go for it. The leveling kit will remove rake and give you a slightly taller and more aggressive look.
Here is my current rig with stock wheels and tires, and the Teraflex leveling kit. Hope this helps some!
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