Your best bet would be to put the 203 back to full time operation. Just about every part time conversion I've ever dealt with on the 203 never really worked right. If you would prefer a part time system, swap to the 205 gear drive t-case. For extra low end grunt, there are kits out there that will allow you use the 203 range box with the 205 t-case, giving you a compound low range.
