67 was a linkage rod that was on the driver side of the carb. the 68/9 went to a cable style. the length comes into play but only in combination with the setting. check both to make sure but i beleive you should be able to adjust the old "new" cable with the recently purchased cable and have the same length as a result! let me know what you find out.
Andy
due to budget cutbacks, the light at the end of the tunnel has been disconnected for non payment.