I just crawled under my '74 SD-455 and checked the codes on the starter and just as Held for Ransom stated, it has a different part number. It reads 1108226 and the date code is 3L51. That translates to 1973, December 5th, 1st shift. So I guess by the 1974 model year, they got more up-to-date with the Super Duty starters.
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