[JPonLKN]

My guess is that it was too stiff with the original 4-leaf, and and the previous owner removed one of the leafs from the springs to soften the ride, but also lowered the rear as a result. Blocks and new ubolts is the best solution, but it could be done with new shackles and shorter blocks. it isn't a lot of height and these are golf carts, not sports cars. One length of bar stock steel the same thickness as those shackles and with a drill and angle grinder, you could make both blocks and new shackles.