Well then, now it is apparent that you started out asking the wrong question, LOL. The difference between the 800 and 801 is little more than the paint and year. 98% of the parts are the same between the two. The model and serial number are stamped into the bell housing. If you stand with your left hand on the starter and right on the clutch pedal and look down you will see either 840 or 841 stamped into the horizontal flat surface. You can get most of the parts that you need right here at YT. In the interest of everything coming together successfully for you I suggest that you consider following the common practice of taking your block with cam shaft and crank to your local machine shop for cleaning, evaluation and prep for reassembly. They will take measurements to see if just honing is adequate or if boring is advisable. The bores are often tapered beyond spec. They will evaluate your crank to see if it needs only a polish or a grind. If it needs a grind they will tell you what size bearings to use. They can resize your rods. They can evaluate your camshaft and install the new bearings. If you want the insurance, and probably save some money you can order the bearings and rings and pistons if needed from the machine shop so that you know that they are all going to go together. Don't bother measuring your pilot bearing, clutch release bearing, or hub. Enjoy yourself and don't hesitate to post back.
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Today's Featured Article - Talk of the Town: The Saga of Grandpa's Tractor - by The following saga is from the Tractor Talk Discussion Forum. Someone. The saga starts with the following message: Hey guys I have a decision to make. I know what you all will probably suggest and it will probably agree with me way down inside, but here it is. I have a picture blown up and framed in my "tractor room" of a Farmall M. It was my Grandpa's tractor, of which whom I never got to meet. He froze to death getting this tractor out of the barn to pull a truck out of the ditch before I was born. Anyway my dad and aunt had to sell it at the auction,
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