I am about to re-install the heater core and defrost duct in my 67 and was looking at what gaskets I'm going to need. I see they sell a heater core seal kit but are all the gaskets used? The kit comes with gaskets that are supposed to go on the blend doors. Did they use gaskets on these doors back in 67? If so, how do you replace the gaskets? I don't see any old gaskets on my doors now.
Were gaskets used top and bottom of the defrost duct? It's been 13 years since the car was taken apart so I don't know what gaskets are needed. There are no instructions in the kit.
Also, when the body shop installed the outer firewall heater cover, they covered part of the holes. The heater core pipes won't fit through. I'm going to have to remove the fender on a new painted car to align the heater cover.
As far as the gaskets and seals I don't ever remember any on the defroster y duct top or bottom. The blend doors used a rubber type gasket that was glued on, and it would be a good idea to seal them because on our first gens there is no water valve so there is always hot coolant circulating through the heater core, and you don't want any air leaks pushing that heat into the cabin on a hot summer's day. Also don't forget the foam rubber seal that slips over the heater core tubes to seal it against the firewall. Don't remove your freshly painted fender. If it's just misalignment of the blower housing cover take the appropriate half round file and make it happen. If for some reason you had to remove the housing the only seemingly impossible bolt to reach is #38 shown in this diagram http://www.teufert.net/partbook/67-76/8-i.pdf (Scroll down to find) you should be able to find a round depression in the fender well that lines up with it and drill the appropriately sized hole for your socket and plug Afterwords with a black plastic plug.