CB750 Frames

can anyone tell me if the '79 750K frame is dramtically different from earlier 70's models? my concern is that the '79 won't have the same line...by line i mean geometry i guess. i've heard that the '79 might be more of a relaxed/upright/cruiser. however, compared side to side, the '79 looks the same as a '78 or earlier.

i appreciate anything you might be able to offer.