Oh no, we have some errors here.
First, those are fake ventiports. They are totally different from the style Buick had on the PA at the time. They also were only on the Ultra version, that clearly is a base version because of the hood ornament. The base had one that stuck up while the Ultra had one that flat and flush with the hood.
Next, the PA only came with 3 ventiports per side, not 4. Yes, 3 for the V6, 4 for the V8. The PA never came with a V8 option. The last Buick to have a V8 before the Lucerne was the Roadmaster.
So they are fake, chea, shitty, glued on jobs from AutoZone and nothing more.