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I am searching for a way to distinguish exactly what engine is in my 1969 F-100 Super Duty single axle dump truck. For the many years I have owned the truck I was under the impression it had the 534 CID engine. However, the carb has been giving me issues lately and upon researching the holly numbers (List# - 6284) it claims to be for a 477 CID engine. The carb could have been replaced at some point in the trucks history, but I would still like to confirm what engine the truck has for future parts inquires. How can I find this information?, I believe the engine to have never been out of the truck but I can't be 100% sure. Thanks in advance.
In '73, they went down to 7.2 (477) and 7.3 (534) compression and the numbers went way down because of "net" hp/trq. In '75, there is a 475, same bore/stroke as the 477. The 475/477/534 were used up until '79, the end of my book.
Quick edit: there was a 2bbl 477, early on, in '66/'67, with HP:231@3400 and TRQ:412@1600 """
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