dash install

[Tom]

I, am about to install the dash in my 71 cuda, it is a non ac car.When I bought the car the dash was not in, my question is , does the defrost duct sit between the dash and the firewall or below the firewall lip. My defrost duct sits about 1/2 inch above the heater box outlet, should it be tight against the heater box. My thinking is that it should fit tight against the heater box, any help or pictures would be greatly appreciated.

 

[4404spd]

The defroster duct bolts
to the inside of the firewall.

 

[moparleo]

Just do this in reverse order.
http://v8tvshow.com/content/view/717/1/

 

[Avalanche]

I believe the 1/2" gap is normal. A lot of people have commented on there being a gap!

 

[Tom]

Thanks for your help, the pictures were great.

 

[steve817]

It seems like an unusual "gap" in the duct work, as Avalanche pointed out. It was mentioned, a while back, that the gap is there to always allow cabin air to be sucked into the defrost duct work. The reason: On those very cold days when the windshield is freezing and a person selects "defrost" and "max heat", it does Not crack the windshield due to the significant temperature changes. The cold/cool cabin air will mix in with the max heat to defrost or melt the ice/snow over a longer period of time. Steve

 

[72chally440]

Here are pics of my recently removed box. and defrost vents. I don't know if there is any difference between 71 Cuda and 72 Challenger. I think the gap they speak of is visible in the first pic if you save and zoom.

 

[steve817]

The gap in the pictures is perfect for 70 Cuda and 70 Challenger.