1984 K5 (SM465/208) the bellhousing on the tranny now is complete & seals up everything like a basketball cut in half - the bellhousing I had shipped to me the bottom is exposed (I thaught they were all the same) - the bolt pattern looks the same - can I use this new bellhousing my old one is cracked - is there a bottom piece I need to buy for the new one? Has anyone ran into this or do I need to post some pics?