I swapped input planetary sets a few months ago, myfirsttime tearing into a 231. It was actually pretty easy. Pay attention to all the parts and pieces. I layed them out in the order they came out and cleaned everything. I did it on the floor of the garage and used a big piece of cardboard layed out. Worst part was the snap rings as previously stated.
Feel free to ht us up for any help or questions.
91 YJ, 350/700R4/231, 8.8/HPD30 with 3.73s, 6" SOA with 38" TSLs. If I ever see the previous owner again, I am going to curb stomp that meth-head brain dead crackpot.