Did you ever remove your A/C?

I removed the ac setup from my 73 duster to toss in a 74 valiant we are reinstalling the factory ac(almost done!!!)
Now I am gonna make block off plate to cover the 3 main holes from the ac setup.

Has anyone found any plugs to fit the oblong holes from where the ac and heater lines come through the firewall? That's the thing I have left.

I will also be adapting under dash fresh air vents and cut the hole on the driver side to have 2 air entry points since duster never have vent window due to the shape of the door frame channel shape.

Building this car with no creature comforts and fun in mind with a 440 swap currently A/C and heater delete, radio delete, manual steering and brakes
All things I can reinstall when I'm an old fart(not anytime soon...lol) and it's too hot with no air or to stop and turn