You can run chevy S10 leafs that are 54". jeep cherokee leafs are 51.5". older chevy full size trucks had 56" springs along with older blazers. all of which can be done, but the centering pin location on the chevy springs are just that, centered in the leaf pack. so it would bring the rear axle pretty far back which would hit the gas tank unless it was relocated, or you would need to relocate the front spring mounts too. if you have enough lift you CAN use the S10 spring packs, but you would need to bump stop just in case.