Leaking exhaust at the manifold is a clear indication that the intake and exhaust need to come off. Probable intake leak as well as exhaust. Remove the carb and attachments (take pictures to remember the way it was). then remove the manifolds as a unit. Have the castings checked for internal and external leaks. (between the manifolds is a heat box that can leak exhaust into the intake) Have the mating flanges that bolt to the block surfaced (with it together) such that flat bright shiny metal is now interfacing with a new gasket on a well cleaned (shiny) head mating surface. Use new studs if at all possible, and new nuts for sure. use a torque wrench to reassemble the casting to head. If it still runs poorly we will help from a position of good intake and exhaust. Jim
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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