I have a Massey-Harris tractor that I was going to restore. I really don"t have the time or money for this project. I would like to put it up for sale. The first problem is that I can"t find the serial number on the tractor. I think it is about a 25-30 HP motor. The only tag on the tractor is on the motor. The tractor seems to be very unusual in that it has a 2 position mechanical lift over the PTO. It looks like it could have been a pre hydrolic 3 point concept. If anyone can help me figure out how to determin the model I would appriciate your help. One more thing the motor has a F 400A on it, if that helps.