Roush Drive Shaft Question??

I'm thinking of putting an Aluminum Drive Shaft in my 2000 Automatic transmissioned car when pulling my X-Pipe off next Friday at Chicanes Sport Tuning??? Ford Racing and a few other companies offer an Aluminum Driveshaft for a Manual transmissioned Mustang cars in my body style but no mention of one for an Auto car! When I inquire about wether it will work or not for an automatic no one seems to know, not even experts at Mustang shops!! So my first question is, has anyone changed out a Drive shaft in an Automatic Tranny car from 99 to 04??? And if so, what one did they use??? Is the length of it longer/shorter then a manual tranny car?? Whats different about the driveshaft for an automatic car vs a manual in my body styled car 99 to 04???? Hoping someone out there may know some answers??? It makes sense to put one in since the exhaust is coming off and I'm putting the Original H-Pipe design back on!! Any answers would help!! I'm guessing I might have to get it up on a rack an measure it???

I figured since no response to this thread and I had a chance to watch Joe at Chicane Sport Tuning install an Aluminum driveshaft in my Auto S281SC, that I might shed some light on the subject! For anyone one out there thinking about swapping out there heavy, not balanced well, Steel driveshaft for an Aluminum one in an automatic Mustang years 96-2004, its really easy and well worth it!! All is needed is to use the original Y-Yoke off the front of your steel driveshaft where it goes into your Tranny (AUTO) towards the front of the car! Remove the old Driveshaft, Take the Y-yoke off the original shaft, remove the Y-Yoke that came on the Aluminum driveshaft and attatch old Y-Yoke to New Aluminum Driveshaft, then put Aluminum driveshaft back in and get ready to go!!! The Aluminum Driveshaft we went with was the one offered by Ford Racing for Manual cars 96-2004!! One my trip away from L.A. back down South to home, traffic was minimal!!! So I got to open her up a little and cruise home at some different higher speeds!! 100 to 140 Mph Boy, at any of the speeds your car is cruising at and especally the higher speeds, things are really smooth with an Aluminum Driveshaft in place and it seemed like my car got rejuvenated and definately wasn't working very hard to float down the road like a butterfly!!! Ok, I have to add this, My car now wants to "float like a Butterfly and Sting like a Bee", (Or should I say Honey Bee, since my car is Gold)