I have no idea what springs were used. The rear springs are 2.5" wide and the front only 2" wide. Somebody told me that's the way CJs were from the factory, but I don't remember on what forum that was. I've had a Suburban, and an F250 that were SOA and they did fine with much more weight. (and stiffer springs) I'm not worried about axle wrap or high center of gravity as this is not a daily driver. I drive like a grandpa most of the time anyway. I would like to do a coil over swap one day, but am not certain I'll ever be able to ever afford it. The smart thing to do would be to go to YJ springs. They'll be new, and I'll know what I have. I have read great things about the flexibility of a YJ SOA. I want to be able to run a 35, and I'd rather not cut the hell out of the tub, so this will not be going back SUA.
I have found the carcass of a CJ5 to pick over but it doesn't have much left. I'm gonna try to raise the case with an original skidplate mount off the other CJ, but moved towards the rear. If I have to I'll build a new crossmember, but I want the case up at least a few inches. As she sits now there is no driveline vibrations. I don't mind springing for new the double cardan driveshaft that I'll need. The pumpkin in the rear axle has already been rotated up, and I'll be doing the front likewise. Well, having it done. The tubes or inner Cs will have to be done to get the angles right so the caster isn't off.
The automatic was a big thing for me. I wanted the auto in a CJ5. Thanks to some idiot in Iraq with an IED, I have hip problems and have to walk with a cane, so driving a stick just won't do. Besides, I have driven a stick too many times off road in Army trucks and I don't want that to be how I spend my retirement even if I were still healthy.