I have a '65 Sport Fury with a 383. I was going to suggest Rockauto.com, but all of their mounts look the same. The driver side mount is a full rectangle and the 2 small bolts are offset. only the passenger side mount has the corner cut a 45* angle. I bought mine 13 years ago from Kanter Auto Products, they were $25 each then. Their website doesn't show motor mounts for our cars, but I would give them a call, 800-526-1096.