I did some research on this, and if you are using the getrag 240,250or 260, it should bolt up using the m44 flywheel, and clutch.
http://www.r3vlimited.com/board/forumdisplay.php?f=129 These guys have the most comprehensive lists of things that can be used together. If I remember from my 318 days, this site has some good info on it too.