Me and my dad went through our old '49 M a few years ago and we ended up doing the 4 1/8" bore. We ended up putting a 450 head on it being the original had 6 cracks, and numerous welds in it. The last time I dynoed the old girl, it was putting out around 66 to 67 horse on 87 octane/unleaded gas. If you want to make power without going the route of stroking an engine, doing work to the head and finding the highest compression piston is the best way to do it. Best of luck with your project!
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Today's Featured Article - Product Review: Electronic Ignition - by Staff. Oil, for example has come a long way in the last 50 years and I don't use anything but the latest API grade available. I've heard the arguments for non-detergent oils but would never trade it for today's formulations. Paint is another, the modern acrylic enamels are great for resistance to grease and fuel stains, retaining their shine and they last forever; unlike enamels and lacquers . Still another is the alternator. No doubt using the original generator keeps the tractor pure, but for thos
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