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I have found that there are literally hundreds of things that can cause a miss on these tractors. I have tried to track this down on a couple of 8Ns before - a side mount 1952 model and most recently a 1948 8N trailer queen. Because I am somewhat of a perfectionist, I simply decided I would find the cause of the miss in my '48 and fix it! It was a fresh full rebuild and I went through a new distributor cam and weight assembly, multiple points, plugs, condensors, rotor, wiring, timing, valve lash changes, manifold, and FINALLY tracked it down to my freshly rebuilt carb. Seem that the aftermarket views the jet hole sizes as somewhat optional :-) That fixed my miss on my '48, but all of the above parts, and several I did not mention "could" be the source of your frustration. On my '52, retarding the timing helped to reduce this annoying random miss (and made hot starting easier to boot). I wish you luck, it is a tough one to track down if you are a perfectionist. Otherwise, a intermittent miss is common in these old inefficient flat heads and doesn't seem to cause any issues in a worker. Dan
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