Fresh Air Duct Cowl elimination?

[Fastd]

So work has finally started on my 70 Challenger. The shop doing the metal work sent some pics and asked if I wanted to get rid of the fresh air ducts in the cowl. I had not tought about this and would like to get some opinions on this. My car is a non-air car but I will be installing a vintage air set up.

So what might be the pros and cons of remoing the ducts?

See pic

Thanks for your input.

[Katfish]

Maybe close off driver's side, but you still need outside air source to draw from.  i think the AC cars only had the passenger side open.

Car would take long time to cool, if you only recycled the cabin air after sitting in sun for awhile.