Hello......67 firebird 400. I believe it to be a non smog car per the delivery code on the car billing history sheet and carburetor code (7027272). Shipped to dealer 02-370 which according to my research is new york. Air cleaner (appears original) is non snorkel. So.. there is an open port on top of the power steering pump mounting plate that WOULD have been piped into the a.i.r. system on a smog car according to the field manual. Given this is a non smog car?....what should that port be connected to? You can see the open port between the two brackets.

My '72 parts book shows just one power steering bracket 9786903 for all '67-'69 PS-equipped V8 Pontiac models. I checked my '68 and it too has the open hole.

It appears to be a pathway for the '67 A.I.R. equipped engines to connect through the bracket cavity to a hole (plugged w/o A.I.R.) in the left head.

Here's a photo of the backside of it from The Parts Place:

Thanks jim. So that opening should be plugged? What would the correct plug be? Wonder why it's missing?

It is not plugged on my '68. When I mentioned "plugged", I was referring to the access to the head, not the bracket.

Ok. Wouldn't exhaust gases come out of there? Seems strange?

Smog engines from the factory have a port on the front of the heads that is open and are drilled into the exhaust ports to feed air into the exhaust. On a smog engine that power steering bracket uses a gasket against the head to seal the bracket to the head and a tube from the air pump goes into that hole on the bracket. On the passenger side there is another fitting that goes into that head.
On a non smog engine it doesn't matter. Those power steering brackets just have the hole that serves no purpose.

Alright..... thank you for the info. I'll put a plug in it simply for asthetics.