Hello, I have a 1983 Virago XV750 (monoshock version) and need a rear swing arm. The problem is I have found swing arms from 1984 onwards without the stucture for the monoshok. Does anyone know if the dimensions of these swing arms are the same? (The distance from the pivot point to the rear axle, the length of the shaft, the pattern of the 4 holes used to bolt on the hub, etc.). I can fabricate and weld the structure for the monoshock so not having it is not a problem. Thks!