When I did my LCA bushings, I had to disconnect the LBJ from the LCA with a balljoint remover from Autozone (free rental). I obviously also had to disconnect the lower bolt on the coilover. When I was reassembling, I put the LCA in loosely and put a jack under the LCA and raised it into position to easily put the lower bolt of the coil over in place. While doing this I made sure that the stud of the LBJ was positioned to go into the LCA hole. Then all I had to do was jack the LCA up and put the castle nut on the LBJ stud. I did my LCA bushings after I did my 3" Tundra coil spring lift, and had the same exact issues your having. I was able to get it in by "guiding" it in with a long 3/8 in extension. But the threads did get marred and made put the nut back on a PITA. If I were to do it again, I would put a jack underneath the LCA, pop the LBJ loose from the LCA, loosen the LCA adjustment bolts and lower it down until tension is off the coilver and easily slide the bolt out, then do the reverse to reassemble. Just need the tool which looks like a large Pitmann arm puller and comes in the front end service kit ( not the one with the big C-lamp and receiver cups)