Can Anybody Identify These Motor Mounts?

I was wondering if anybody can ID these motor mounts. Basically I am wondering if there are a matching set from a 76 Cordoba with a 400 I parted many years ago, but can't remember which is which? Please see attached pic. Thanks in advance for any help!

A #4001746
B #3642820/3642826
C #3642821/3642827

The one on the far left obviously is the same as mount A

The two on right look like slant 6 the other both look to be right hand big block maybe?

I am almost positive that mount A is from the 76 Cordoba with a 400. The others I have no idea.

My best guess would be the two on the right are /6. The 6's do not have the ears to bolt the mounts to on the blocks

The left two are big block 74-78. The right two are NOT for any V8, so that leaves a slant.