boy oh boy had a (1950 JD D styled) dropped off over the weekend it is a good looking tractor in original paint but when parked Rats built nest in the exhaust water got in the cylinders and made a real big mess. We were told to free it up and get it running saw the mess in the exhaust and pulled it decided to pull the head and wow! that thing has sat for quite some time to have that much build up. That was after we tore into the 2000 that had a knock we found that the last person that was in there put a standard piston in a a .020 over hole. I guess he thought 2 correct out of 3 wasn't gonna hurt.