Look at this.. (a turbo slap-on story for a 7MGE). It may be interesting
http://www.supraforums.com/forum/showthread.php?t=97101
(the photo links in the web link posted above are mostly dead.. its a 7 year old thread)
Also.. photos of a 7MGE-t
http://smg.photobucket.com/albums/v514/JTrue/?start=440
and.. if I recall from all my reading.. it isnt that expensive to do (if you have the parts already handy), but what you have to do afterwards is the costly part..
Apparently, its a nice setup if you do get it to work properly.. but its got some nasties waiting at the end.. lol. Hope your more mechanically inclined than I am.. I just wouldnt have the time/skill to do it correctly.