Those appear to be 300 engine mounts. In fact, they look alot like the 64 300 engine mounts. The 64 mounts were narrower between the two mounting tabs and the frame tower was taller, so the rubber part of the mount is not as thick. If you measure the distance between the inside of the tabs and let me know, I will compare to one I have laying in the shed and tell you if they are 64 or if they are 65-67 300 mounts.