"...Expense is not my concern. I am going to do the work myself. My only concern is he ting the gears matched correctly. If I knew u could swap the open carrier out and put in the posi without having to re shim any gears..."


Sounds like this is one area where you should pay an expert to do the job for you. Setting up a rear properly, takes experience. And this is done with exactly the correct shims, placed in exactly the right places. Incorrect set-up can cause excessive noise and premature gear failure.