Quick update, I reached out the Sharkwerks and they do not assist with this type of build.
Apparently, they will only install what they sell. Furthermore, if I bring them a transaxle and want a diff put in, they won't do that either.
Now that I have a Wavetrac diff and don't have anyone to install it, I realized that I also need new carrier bearings. I can't find anything on them.
Does anyone know the part numbers for the carrier bearings in the 987.2 6mt?