Yes, buy the complete front housing out of the sport, and swap it in. This will elimiinate the CAD and give you an excuse to get some manual hubs. When i got my sport front diff, i opened it up to install my locker and it was so clean i don't think that truck was ever put into 4wd. I bought my rear set new I used my friends '04 sport vin at the dealer to confirm the part # i got on here.

1999 Montero SAS'd on Kings and stuff

1998 Montero trying to get a V8 Swapped