so I'm starting to take the truck apart. po lived on a lime rock road, what a mess.


this is the 78's heater box. what's with the giant hole? the duct doesn't look like it was cut. is it from another truck maybe?

 

 

Looks like part of the defroster duct was cut in addition to a small part of the heater box. Maybe PO was trying to get more heat out AKA another vent.

 

a few more pics. I don't think it's been cut up, it's to nice a hole . I think from looking the defroster duct is the wrong one. here's a couple more pics.

 

It looks like just the defroster was cut. There should be a foam gasket also to seal it up.

 

from parts catalog pic, it looks like the wrong defroster duct.

 

Now I am confused. Look at this one on e-bay. It looks just like yours. Mine doesn't, go figure. http://www.ebay.com/itm/1973-1974-1975-1976-1977-1978-1979-ford-truck-defrost-duct-f150-f250-f350-/161555443863?pt=Vintage_Car_Truck_Parts_Accessories&hash=item259d747097&vxp=mtr

 

Bottom of mine looks like this. http://www.ebay.com/itm/DASH-VENT-HEATER-DEFROSTER-Ford-Truck-1973-79-F100-F150-F250-F350-77FT2-4P7-/261731883381?pt=Vintage_Car_Truck_Parts_Accessories&hash=item3cf06f9975&vxp=mtr

 

That looks like a defroster vent from an a/c truck. See the pic I attached? See the 2 rectangle opening on the a/c box top?

Rear is for the defrost vent and the front is for the flex tube that goes to the center dash vents.

Your defrost vent looks like it would fit the a/c box? Do you think your truck was a/c at one time?

At least he should of put some duct vent foil tape on that big ol hole?

Looks like same pt# for the defrost vent a/c or none a/c.

See pt # 18490, but the none a/c vent looks to have a short flex adapter pt # 18547 ??

 

subscribed for future use

 

Anyone have an answer for original question of non fitting parts? I have same issue with doner heater box and defrost duct from a 79 bronco. Is there a gasket missing? Parts chart does not show a gasket?

 

Here is a potential gasket I found on eBay but not listed in part catalog

http://www.ebay.com/itm/1975-1976-FORD-F100-F150-F250-F350-TRUCK-NOS-Heater-Defroster-Nozzle-Gasket-Foam-/291364029521?hash=item43d6a64451

 

Anyone have an answer for original question of non fitting parts? I have same issue with doner heater box and defrost duct from a 79 bronco. Is there a gasket missing? Parts chart does not show a gasket?

 

Look here yet? Ford HEATER AND A/C - 57-79 Truck, 61-67 Econoline list - CG Ford Parts