I just got a new to me OC 4 diesel. It has a Weldco Dozer on it. It needs a little work, but they all do! The serial number plate is missing. The engine ID plate is there and the engine serial number is 3600238. This should be a 1958 model and I figure some where around serial number 1WD472. Does any one have a diesel model close to these serial number and have the engine serial number too?? I will see fi I can post a picture too!!