[6768chevylover]

In a truck the heater lower vent and def. vents are more than enough for warmth but I too am in the process of switching to a non/ac box in my blazer and deciding what to do with the ac vents. the PO did a hack job on the engine comp ac box and gutted the internal box. lucky for me I have spare non ac boxes. just trying to figure out the a/c vents since there is only 2 holes to work with in the non a/c box...