I talked to a man on a swap-meet today. He´s a knowledgeable musclecar collector. He owns a -67 Z-28, built in Antwerp. Therefore it´s not one of the 602 built in the U.S. He says it´s factory-equipped with a TH400 automatic. That is just as impossible as Pete Este´s Z-28 convertible.
He also said that he has located two cars here in Sweden, that he has been unable to buy. The first one is a -69 L-88 Corvette convertible in rough condition. The other one is a very nice -69 L-89 Camaro convertible, I believe he said that only eleven where built. Believe it or not !