John you are right, Performance did build eight 6.0s with self tacking jibs for the Worrell. Gary and I owned one of these boats for awhile. I thought the mast was the weakest point on this boat. Boat also had big spinnaker with broad shoulders ... DDW. This boat also came out of the Santa Barbara area and had very little use. Not sure if it raced in the Worrell or not.
Buzz