Two of the common spec numbers for this tractor were 71147 and 71355 of which shortblock 45 522 40 works for them. To use the 47807 or 71358 engine there are several modifications required. The oil pan will have to be removed and instead use the pan that is welded on the frame. The stub shaft that is currently on the engine will also have to be used. The wiring may be slightly different.
Additional Info
The oil pan was welded into this frame and also held up the front axle. Here is a picture of what the oil pan looks like welded into this frame.
