Anyone done Under Dash A/C ?

Yep I was really thinking about doing the under dash unit. Looks correct for the era and I'm not really to happy with the look of the vents hanging under the dash on the vintage air system. If I could route the vintage air vents thru a factory style under dash unit face I'd like that. Just not sure that would work. Anyone know if there is an option for putting the vents into the dash on any of the other type units?