wow your wife has a nice wheel base
I say NO
Not hard, I've done it, 2 better methods that won't lead to a lot of broken springs..
You did not mention your lift or type...
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if your SOA
1. look for front waggy springs, or rancho 44044 would be a good up grade, same basic length of the YJ srpings, the center pin is already offset 3 inches.
if your spring under
2. re-drill your spring plate and spring perch 2 inches and move the axle back that way, much better idea, I have also done this method, works great.