Ask me to take pictures or measurements of anything that defines the v20 hull and I guarantee they'll match the 68 Seabird V21 hull. *The 70's and up Seabirds were a different hull, but I believe the 68 Seabird V21 mold became the 70's up V20 mold. It's even got the strakes on the bottom that don't run the full length. The only difference I can see is that the gunnals are cut a little shorter towards the stern on the Wellcraft.