my m 715 was converted to a 402 bbc as far as i know 10 to 20 years ago i am now trying to replace the clutch its has froze and i can not get the bell housing away from the t 98 tranny has some kind of weird adapter looked at novak but did knot see one like this i can get pics!!!!! i ve worked on chevys but this military stuff has changed do any you pro's know what to do or know about old conversions i am stuck and want to drive this 715 please help

thank you