Removal of A/C-heater box?

I'm considering removing the A/C heater box out of my 68 Dart. I never use the heater as the car is just a fair weather hot rod and the A/C components are loooong gone.

Can I remove the box under the dash and cap the hole for the PS fresh air vent, heater motor, heater hoses, AC lines, etc??? Has anyone done this? What else in involved?

I just figure why have all that junk behind the dash if it's not being used.