Some of the masts that were used on C&C boats were special designs used only on C&C boats. In the event you don't get an answer to your question here, join the forum at cncphotoalbum.com You will tap into a tremendous wealth of information from other C&C owners who know your specific model intimately. You should also include some specific information about the mast such as if it is a single, double or triple spreader rig. Photos and dimensions also are very useful.