Sounds like you have the earlier trans. The aluminum case trans like mine has an integral bellhousing. The following thread has pics of my '84 trans for reference: http://www.peachparts.com/shopforum/diesel-discussion/340960-clutch-problem-240d-2.html

BTW - the iron case trans is supposed to be stronger though both are pretty tough. As I don't do dragstrip-type starts with mine I expect it to live even behind the hoped-for 300ish HP.

Dan