I am putting a 360/t18 combo in my 715. the engine/bellhousing is from an 80 j20 with t18/np208. I am mating it to a t18/dana20 from a 79 j20. Here is where things get iffy. the t18 from 80 truck has smaller pilot diameter and shorter input shaft than 79. also, the 80 uses a clutch arm and rectangular t/o bearing that is held on with two clips. 79 uses a fork and round bearing ala chevy. Will the 80 clutch/press. plate and t/o brg work with 79 tranny? will I have to use '79 bearing and fork? What combo of parts do I need to make this work? I speak chevy fluently and I speak passible Ford but AMC is indeed a foreign language.