For starters for a quick answer till i could get you more info..
you can use the t350 to 205 adapter and sleeve..
I think you have to have something done with your tailshaft of the 700r4. You would still have to do tha same even if you paid the big money for an advance adapter..
Hopes this helps..
and if you go to ask where you can find one
You can go to the site in my signature and I believe we have a couple used ones for sale..
don't know prices..