Based on the pics your front springs don't even match each other to begin with - likely they are a conglomeration of random leafs/springs which is pretty typical of South American 40 series. You can see the shackle angles are very different side to side and the spring clamps are not the same side to side either. Do not be surprised if you also end up needing to replace shackles, pins, and U-bolts, and spring plates as all are likely replaced but old parts.
unless you think you are likely to add a heavier winch later I would recommend a pair of OME CS001F (and new bushings) which should keep the height around the same and will likely ride and drive a LOT better. I can have a setup in your hands within a few days or so
407-257-3693 /
info@cruisermatts.com