I'd do some searching amongst the posts here - there have been a few posts about swaps, with mostly pretty negative f/back from those who have priced it out - there is a shytload lot of custom fab work involved. The word seems to be from those who have done it that it was more work and cash and time than they expected (two g2 owners on this board have done it, I believe).
The general conclusion seems to be trade or sell your AT and look around for that elusive low Click 5 speed.
being an auto owner alls I can say is I understand...
and if you pull it off you will be some kind of legend god.