Just a bolt some washers and a "U" bracket.
At first I used a 2x3 attached to the tack and clue but that would not let me sheet out far because of the pulpit.
I made the pivot and moved it back about 18 inches.
I replaced the wood spar with the alum. one since I needed a gin pole to step the mast anyway. The pole is 1 1/2 inch by 1/8 thick alum. tubing.