I'd do the flip of the front bracket too. Just doing the rear will work, but won't garner quite as much lift. Plus, I personally am not a fan of really long spring shackles. Just another strees point to break later on the trail somewhere. I think that puts undue stress on the frame mounts that way.
The worst part of flipping the front pivot, is removing the fuel tank to grind off the weld where the pin comes through to the inner plate. Other than that, it's worth the effort.
"Free advice is worth what you pay for it."™