12. Here are the two V-8 brackets fully assembled with mounts. On the left is the ’67 and ’68-’70 convertible/big-block/Boss bracket/mount combo with the top bolt-hole away from the edge at an angle. On the right is the more common ’66 and ’68-’70 non-big-block/convertible mount/bracket combo with bolt-holes parallel with the edge. These mounts and brackets are not interchangeable.