As you said you had it apart you no doubt noticed the degree of advance shaft you have assuming you have the IH distributor. It can be one of several, like 25degrees, 30 degrees or 40 degrees. Normally if all is in good shape they will be timed to tdc at very low idle speed and gradually increase to max advance at rated engine speed. With normal gasoline engine, flat head pistons, thinwall sleeves the engine will perform overall best at 30 degree advance. You can do any variation that suits you. There are so many variations in pistons and head changes that it is really difficult to give an exact figure but it for sure has to advance when engine speed increases. Too much it will run ragged unloaded, detonate under load, too little it will sound dead and lack pep and power.
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Today's Featured Article - Ford N-Series Transmission/Hydraulic Fluid - The Full Story - by Llamas. The transmission fluid in an “N”:-series tractor lubricates the transmission, differential, rear wheel bearings, PTO and hydraulic pump drive, and it also cats as the working fluid for the hydraulic lift. In 9N/2N models, it also lubricates the steering sector and shaft system. The owner’s manual for the 9N and 2N models specified the use of only two fluids. They were STRAIGHT MINERAL OIL SAE 90 (above freezing) and
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