I've put a '78 k tank on a '75 f to check out the look
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, as far as I know the the 750A and the '77-'78 k tanks are the same dimensions and shape. It has been several years ago, if I remember right there was a little gap between tank and stock seat, that tank looks good, nice and wide
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. maybe some of the 750A guys can clarify if these tanks are the same as the later K models.