Hi I got a T120V the engine # says it was made in sep 1974 but I cant find anything on 1974 as from what i understand thay did not make them in 1974 but an also been told that the 74 was parts of 650 and 750 ect any help would be great as i am in the middle of a rebuild as she sat in a shed dor 26 years and has water damage .tom