This should help if you didn't find it on PBB already...
http://www.pirate4x4.com/forum/showthread.php?t=866064
Did you check over on Hardline about what they use to adapt the GM trans to a Ford style 205?
I'd have a hard time sinking $600+ in adapters to keep a $100 T-case... unless you're strictly a rock bouncer and have no need for a better low range.