i got my driveshaft from a JY. They are pretty cheap slap some u joints on it and good to go. For the flywheel and clutch you may have some trouble the clutch needs to be splined to accept the input shaft of the trans (if they are different between years) flywheel will be engine and year specific also need to make sure if you get a newer clutch that the older flywheel has the same pressure plate bolt pattern. Different part numbers could mean different designs IE bolt patterns spline count etc. or it could just mean they changed the number to represent a revision in the part somewhere else. So best case scenario just get a flywheel for your year and clutch kit for the trans year and mate the two. Worst case if the bolt pattern is different you will need a pressure plate for the 90 and clutch disk for the 96.
New DD-2009 Ford Mustang GT/CS candy apple red.
(sold)2003 XLT Tan 3.0L V6 5-speed, Lots of mods.