Nothing in the front needs to be lenghtend, in the rear just longer shocks. Just don't go to long or the springs fall out as the axle flexes. I'm jelous about the locker, they are hard to get in the US.
Dennis


95 Sportage, gone but not forgotten.
98 Jeep TJ, 4" Zone springs with RC Long arms, Ford 8.8", 4.56 gears & Detroit locker rear, D30, 4.56 & Detroit Trutrack front.