Gary: I will conceed there may be differences, as I'm just going from memory. I must admit the only wide front I ever had separated from the bolster was my 300.
Something you might check, as it just hit me the reasoning for needing the spacer. All pre 1958 tractors had the steering shaft go to the top of the radiator. On 560 and 656 that same shaft ended at the top of the bolster. I expect that bolster had to be built thicker at the center, to give strength for the punishment a narrow front would give.
My SM was narrow front, however check this one also, I believe my 300 had longer spindles than the 560 or 656. Just wondering if SM, SMTA, 400 and 450 also had longer spindles than 560 and 656. Thicker bolster and shorter spindles may well be the difference. I don't know if I'm right but it makes sence. I do remember looking at 560 when new, and thinking I'm glad I didn't go narrow front with that short steering shaft.
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Today's Featured Article - The Cletrac General GG and the BF Avery A - A Bit of History - by Mike Ballash. This article is a summary of what I have gathered up from various sources on the Gletrac General GG and the B. F. Avery model A tractors. I am quite sure that most of it is accurate. The General GG was made by the Cleveland Tractor Company (Cletrac) of Cleveland, Ohio. Originally the company was called the Cleveland Motor Plow Company which began in 1912, then the Cleveland Tractor Company (1917) and finally Cletrac.
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