Vintage Windward Sabot

I just picked up a fiberglass Windward Sabot and am in the process of restoring her. The boat has a center Mariner traveler with a 1” car I’m trying to find out if this is original equipment or a modification? I can’t find very much info on this boat. It has a sabot sail # 1785 any info would be greatly appreciated.

Thank you,
James