Those are truck mounts. Also use top lock nuts. The washer goes on the bolt and is installed on the block side nuts go up against the steel mounts without washers. Do not use lock washers only flat washers against the cast iron. Top lock nuts are all steel no plastic like nylocs have.
Uh, I don't know 'bout that, OMM- those do look like early A mounts to me. Tried to get a pic of mine, but couldn't get the camera in there- but from a quick visual, they're a match to what's on my '66 wagon.
