There are 2 different upright mufflers available. The one with the longer bottom section probably is a retrofit for early models. I have always been under the impression that when the CA came out that the B also was changed to the style with the short bottom section. All of the ones I have and have worked on from around 1951 and later had the big hole in the hood that appears to be factory. If not someone done a very nice job cutting them. There is also another style brace that came out before the one you have that bolted to 2 of the valve cover bolts and had a clamp that attached it to the body of the muffler. Unfortunately I do not have one on site now to take a picture of it. I have also learned over the years that it is impossible to be 100% sure of anything when it comes to tractors and what the factory done at times. Lee
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Today's Featured Article - A 1937 John Deere Unstuck - by Gary Hickman. Here is my story of how I got the pistons out of a 1937 JD B that the engine had been stuck for about 14 years: About 12 years ago my Dad gave me one of the tractors I ran as I was growing up on our farm in central Nebraska. The engine on this tractor, a 1937 John Deere "B", had been stuck for 2 years before he gave it to me. This last spring (1999) I hauled the tractor to our 2 acre lot in St. Libory Nebraska where it joined my antique machinery collection, at that time a 1929 Caterpillar T
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