The "C" brackets were only used on the K0-K2 750s. They will only mount properly on the early year fork lowers. If your bracket does mount properly to the lowers, and the adjuster bolt doesn't line up with the leg, then you have a later arm. Pictures of the fork lowers showing the mounts will help identify what you have. Also, pics of the top triple and the gauge mounts, and caliper, please.