Quote:
Originally Posted by Slow Build
That under hood heater is not an AC unit .
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This is an under hood A/C heater box and core. The center air flap allows fresh air from the cowl area to bypass the heater core and enter the cab. The dash's backside needs to be cut between the mounting bolts to accommodate. There is a template for that on one of these threads. The under dash A/C component takes the place of the under dash heater box and directs both the cooling and heating air. From a 66' GMC 2503...