The problem I see is the TOB sleeve that bolts to the late tranny right over the output shaft seal. 3, 10mm bolts. If possible, you might be able to get the TOB collar for your pressure plate, I'm assuming your existing pp is the diaphram type, if You can get the collar, all you would need is a new early model TOB. One more thing, some of the early transmissions had the three holes drilled and tapped 6 x 1.0 but no sleeve was attached. look in there, you might get lucky.