I have a replacement block in one of my M's. D Slater helped me figure it out a while back. Nothing is ground off but it DOES have C-248 cast into it and date decodes as 1959. It too has the plate on the carb side and cored for a dipstick.
It runs so I haven't taken it apart to see if it uses thick sleeves to make a 248 but has a primary bore of a 281 or if the primary bore is the original 248 size.
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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