OK, for '67-'70 manual steering you had a 6-3/16" long input shaft, 1-1/8" diam. sector shaft with 19:1 ratio, part #C7ZZ-3504-A or all the same measurements with a 16:1 ratio, part #C7ZZ-3504-F. For power steering it used the 16:1 ratio, same part #. '65-'66 was set up the same way with M/S part #'s C5ZZ-3504-A (19:1) or C5ZZ-3504-C (16:1) and power steering using the C suffix part. '67 had a couple other boxes that don't fit anything else-who knows why. This is from my Ford Master Parts Catalog-May '75 edition. Hope this helps.
Steve