Over on Piston Heads there is a very long and interesting thread on transplanting an Audi V6TT, yes 6 ,not 8.Found by Marcus.
Yes, they show the practical process - not just dreamers !
http://www.pistonheads.com/gassing/topic.asp?t=1571615
And yes, it fits and there are photos
http://www.pistonheads.com/gassing/topic.asp?h=0&f=47&t=1571615&i=220