383 on ABody BB KFRAME?

The boss you have the square around is usually cut off or cast without them on the original 383 A-Body blocks.

The block in my picture is not my factory block. No need to cut it off on my car as it still fits just fine with it in place.

Right now I have the 69 HP block you see in the picture above, a 69 HP block from a Super Bee, a 67 Block, and two 70's 400 blocks, all of them have the bosses on them.

It was hit or miss I guess. I have not found any pattern to determine which ones had them.

I can tell you that I pulled some parts from a 70's C-Body one time and it had the bosses, and they were being used to mount the power steering pump. I was surprised to see that.

-Dave