HELP: Power steering pump bracket needed (I think)

[GAc10boy]

In need of some assistance. I recently had the AC converted and fixed on my factory AC '85 c10. The motor was originally a 305 but has been motor swapped to a crate 350. I say all of that to say, i've developed a pretty bad vibration with the AC on while idling in gear.

The AC shop noticed that a bracket was missing on the back of the power steering pump. I'm turning to you all for help to help me identify the bracket for the pump to block. Please see pictures below. The truck has headers but it has the upper bracket from the top of the pump to the first header bolt. I'm kind of grasping at straws and unsure if this will help with vibration at idle but it appears something is missing there so I'll give it a shot.

Help!