Engine mounts 318 - 360

I'm a little confused and could use some info or advise on motor mounts. I understood that the difference between a 318 block and a 360 block (as far as motor mounts) was that with a 360 block and 318 mount, a spacer would be required in order to use the 318 mount on a 360 block

Below is the driver side engine mount on my 360 (1990 truck) block. I will post a picture of a 318 mount in the next post.