KickPanel Vent Info/Help

[SunSoaked]

I replaced the factory AC in my 85 with Vintage Air. In doing so, I lost the PS floor vent that was tied to the OEM AC system. My truck did/does not have a DS vent, only the plastic kickpanel cover.
I want to add factory style manual vents in the kickpanels. It seems to be a little confusing to say the least when looking at different websites.
I know for a fact I can restore the passenger side with a manual vent. And I found a set on ebay that has both PS and DS.
My question is: On the DS, is there a provision (Hole) behind the plastic cover for a factory vent or will I have to make a cutout in the metal to fit one? Is this a fundamental difference in factory AC vs Non AC cabs?