The hull is 18 feet 1 inch long and 5 feet 1 inch wide and has a squat, classic whale boat type shape.  Topsides to keel is no more than 22 to 23 inches.  The center board should not draw more than 2 feet and is ballasted internally with cement set around the centerboard slot.  All internal bulkheads and seats are wood coated with glass.  The hull may be wood covered with glass or just glass.Mast stay rigging is still attached to the topsides and a modern swivle main sheet cleat is still attached to a center cross- beam.The boat has dimensions similar to a Rhodes marlin, but it is not a keel boat as Mystic describes the Marlin plans.  This boat was probably built in the 60's.  The craftmanship is very good and has stood up to its recent conversion to a motorized fishng boat.  My son and I want to restore the hull and refit the mast (boat has simple tabernacle mast step) and rudder, but need to know what to rig.  Have photos, but do not know how to attach to this blog.