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Old 01-26-2006, 10:41 PM
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Volture
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Default O.S. 61 SF vs. SF long stroke
I just got a mint O.S. 61 SF. It is an ABC engine. Can any of you tell me how to tell if it is the regular 61 SF or the long-stroke SF? Mine measures 2-15/16 inches from the top of the mounting lug to the top of the head. Are there any distinguishing features between the two engines?

Thanks.
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