it's always a good strength upgrade :thumbsup: , but isn't really needed in an MJ until 6+, and even then some guys don't have them. we have a much longer wheelbase than wranglers and cherokees and so we don't suffer the sharp driveline angles that they do.
but you will want a longer driveshaft at 4+. unless you upgrade the rear axle (which I highly recommend if you want big tires), which the new axle will have a longer snout on it and so balance out the height.
what are you doing for gears and axles?
oh, and welcome to the club! :waving: