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Discussion Starter · #1 ·
i just got a 1978 JS 440 and i will slap smoke my 1991 JS440 that i now is pretty much stock. ive noticed the carb is bigger and it has an after market exahust on the '78 but other than that it all looks the same does anybody have any specs on carb mm and bore and stroke on a '78 im courius to know if it is really a 440
 
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