Spotty,
I went to SBS's web site to look for the part number for a 75 CB400F but their database did not show any matches (also tried a search for a CB500 and CB750 with no results).
What I am looking for is a pad that improves the stopping distance (i.e., higher friction coefficient). As most of us know, the older Honda's with solid stainless steel rotor are somewhat marginal. The wear I observed on the original pads was minimal, so a higher wear rate is not a problem if the pads have more "bite".