has anyone thought of this?

After somewhat extensive research, I wanted to check here to see if anyone else has any ideas about putting the GETRAG 6 speed from a focus svt into our cars. Seeing as the focus and cougar as well as many other FWD Ford products share the same transaxle I think this may be possible. The only problem I am seeing is if the input shaft and splines will match, I realize that it will for the 2.0 Zetec cougars/contours, but what about the 2.5/3.0 duratecs? I have been looking everywhere to find the spline sizes and tooth count for both cars and have found nothing. If anyone can give me some answers I would greatly appreciate it.