Pulley ID part 1

[Cranky]

I believe these are BB's...water pump pulleys for sure. The one on the left is 5 7/8" and the one on the right is 5 5/16" and all have the same offset which is about 1 1/4" from the face to the back edge. . The small one has a part #2951092. I've worked on way more BB's than small blocks so I'm pretty sure that's what the one on the right is for but need someone to confirm the one on the left....or both. Thanks

 

[Powerflite]

Not sure about the left side, but the right side is for 440, 400, 383 with A/C '69-'72.