My 66 Charger sat in storage for a number of years before I bought it. When I cleaned under the back seats I found a bunch of leaves and acorns. A couple of times when using the heater some leaves blew out onto the carpet. I want to try to clean out the heater box without removing it from the car, since the air has been recharged and is working. I will be changing the dash speaker, so I will have the glovebox liner removed. I will also be removing the front seats to have the foam replaced in the bottom cushions. Is there a blower resistor or some other access hole I could use to try and vacuum out the leaves and such?