I have a CT70 with a 4-speed standard transmission. I would really like to put the 3-speed automatic trans into this bike. is this an easy swap?, What parts will I need exactly please? A parts list that is required would be very nice. Thanx in advance. PS,,,it is actually a CT70H original 4-speed that my father bought for me for my 13th b-day in 1972. It is original 4 speed and is not a conversion. Could this be as easy as just swapping out the clutch pack and not using the clutch lever any longer???