I just acquired an Oliver 80 from an older gentleman who knew nothing about the tractor.  From the data tag, I learned it is an 80 and there is a 1 1945 on the block.   I believe this tractor is rare because of the wide front and long rear axle shafts.  The back rims are from a JD.  It is a crank start only.  It has been stored inside and so I think it will start.  It was running and driving great at the time it was parked fifteen years ago.  I would greatly appreciate any and all information you have on this such as shift pattern etc.