You are working with a engine that was designed to burn a low grade fuel. Raising the compression and not using a fuel to balance that will lead to gasket failure. Magneto couplers on those tractors had a 35 deg. advance. You will need to change that to around 25 deg.coupler so you will have some range on your timing. Unstyled "A" has spots in the head that flex & will eventually lead to gasket failure.They need to be reinforced. I personally don't care for copper gaskets. I usually "O" ring the block & head at slightly diff. dia. which gives it a lasting crimp on the stock metal faced gasket. "O" ring wire protrusion should be .005 - .006. If you can come up with better quality head studs it will make it a better job. Email me & I can walk you through it.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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