I grew up driving an 800 that I first drove when I was 8 years old. It was given to my Dad and I used to sit on it when I was 3-4 years old and ply with the steering wheel making the front hubs (up on blocks) and I now have kids that I want to teach how to drive a tractor and since the oldest turns 10 next year I started looking for an 800. I bought one today at an auction that seems to have parts off several different tractors. My Dad went with since knows more about them than I do. It is the same as an 861 with the two stage clutch. It has a later rear end. It looks like a power unit engine. I am told the right hood is off a select-o-speed because it has the hole in it for the PTO cable. I have a feeling it may have been an 871 that someone put a five speed transmission and then put a power unit engine in. Either way it seems to, in essence if not in name, be an 861 with a two stage clutch and a five speed. Before I put my son on it next spring I am hoping to find a front bumper/hitch of which I could build one but I prefer to find an original. For now I have one main question. How do I figure out what engine I have? It has the bigger manifold with the 2 inch outlet. I look forward to any commentary and suggestions anyone has.