Our first 5er had to be "flipped". It had Dexter axles mounted on a sort of bogie that was welded to the frame. The fix was to unweld the bogie, put in spacer bars as shims welded to the frame and weld the bogie onto that.
That way it preserved the axle alignments and the whole assembly. Another thing to mention was they had to extend the wires to the brakes which were too short after the flip.
That got the trailer height close enough that then adjusting the pin bracket and the hitch bracket was enough to level the trailer. Using taller tires was not an option due to wheel well clearance and the spacing between tires front and back.