Topic: firewall holes

[Ashley]

Hi to all: Anyone have any information for holes in firewall on a 1967 S code, non-air car. Previous owner added aftermarket air and drilled a bunch of holes that will have to be filled in to correct firewall to original. Did all cars have opening by blower motor for ac, if so, what was used to cover hole on non-air cars.  Thanks

[Bob Gaines]

Hi to all: Anyone have any information for holes in firewall on a 1967 S code, non-air car. Previous owner added aftermarket air and drilled a bunch of holes that will have to be filled in to correct firewall to original. Did all cars have opening by blower motor for ac, if so, what was used to cover hole on non-air cars.  Thanks

I will let someone else go over all of the different holes that would be in a original non A/C 67 firewall but to answer about the hole for the A/C hoses that was a punch out or cut out metal portion of the firewall to accommodate the lines from the evaporator core that the hoses attach to. Another piece of metal will have to be cut to size and welded back in with no doubt body work to make it appear as untouched original.

[J_Speegle]

Hi to all: Anyone have any information for holes in firewall on a 1967 S code, non-air car. Previous owner added aftermarket air and drilled a bunch of holes that will have to be filled in to correct firewall to original. Did all cars have opening by blower motor for ac, if so, what was used to cover hole on non-air cars.  Thanks

Ok we are starting with a 67 S code non- AC. Thanks

Just in case we run across a running change or two - When and where was the car completed.

Manual or automatic? 

Guessing power disc brakes?

[J_Speegle]

As for the AC modification to the heater motor opening here are a couple of examples. Going to be tricky welding a piece where the cut out is or was since there is a bend in the sheet metal and would be difficult to get a grinder in there to finish if you just did the insert. Instead considering finding a donor and splice it in on top of the raised edge or around a larger piece where the metal is flatter and easier to refinish so that the repair is invisible

[Ashley]

Hi: Car was built on 10-21-66 at San Hose with S-code, factory air, C6 trans, power disc brakes. From pictures looks like all cars had the knockout plate and was removed for air cars. Thanks to all

[Bob Gaines]

As for the AC modification to the heater motor opening here are a couple of examples. Going to be tricky welding a piece where the cut out is or was since there is a bend in the sheet metal and would be difficult to get a grinder in there to finish if you just did the insert. Instead considering finding a donor and splice it in on top of the raised edge or around a larger piece where the metal is flatter and easier to refinish so that the repair is invisible

In reference to my post about repair you can do the repair by tack welding in from the back side (interior side) of the firewall to give the proper knock out look . Of course you can do it your way but it is a lot more work .

[J_Speegle]

Hi: Car was built on 10-21-66 at San Hose with S-code, factory air, C6 trans, power disc brakes. From pictures looks like all cars had the knockout plate and was removed for air cars. Thanks to all

Bit confused though (likely just me 

In your first post you wrote

"Anyone have any information for holes in firewall on a 1967 S code, non-air car. "

While above it states

"Car was built on 10-21-66 at San Hose with S-code, factory air, C6 trans,..."

There are other holes that should in in the firewall if its an factory AC car that would not be there for a non-AC car

Thanks for the date. Will find and post other pictures related to the other surfaces of the firewall to help

[196667Bob]

Attached are a couple of ""Firewall Hole Location" Illustration ajd pictyures that I have picked up over the years. I don't know who we have to "Thank" for them, but obviously a lot of work weent into them. The one that has been "doctored" from the Assembly Manual was very dark ; I hae lightened it up as far as I could without losing much detail.

To get the most out of them, you should download the two so you can then zoom in accordingly.

Hope these help.

Bob

[dkknab]

The Assembly Manual for your year is your goto document.  For 68s, this info is in the Body section,  page 18.

[J_Speegle]

Thanks guys for helping out.  196667Bob agreed someone put in some work doing those pictures. Unfortunately both resources don't represent all of the holes nor the differences between different options

Not anyone's fault just some are skipped, have sealant applied over them, missed or not clearly visible in the products shown or mentioned.

Still not exactly sure if the OP has an AC or non-AC equipped car so will stick with non- AC. We can always cover the AC related holes and changes. Just to keep the confusion down as best we can. Since there were some holes made at the stamping plant which would make those standard (can't recall if there was more than one plant stamping these) while holes made at the car plant can vary some since not all had guide divots provided

Here are some pictures from non-AC cars without PB.

Holes around the steering column opening




Holes around the throttle arm opening - V8




V8 Automatic equipped master cylinder side




Another look from the same application as above. Some are hidden or covered with sealant




Center firewall - Appears to be V8 Automatic with out AC. 6 cylinder throttle divots are difficult to see mid-firewall at the bottom edge as well as the ones near the heater hose bottom hole




V8 non AC passenger side firewall. The top two heater attaching holes do not have the smaller holes near each larger ones used for attaching like the two at the two lower mounting holes. Covered with sealant. Passenger side 6 cylinder divots are visible in this picture




With the small four holes I was referring to above




Another just because I up loaded it 

[Bossbill]

In reference to my post about repair you can do the repair by tack welding in from the back side (interior side) of the firewall to give the proper knock out look . Of course you can do it your way but it is a lot more work .

I did that on my 65 and it worked great. For extra credit I later used this hole for EFI and the tack welds broke correctly.
Two-fer.

[Bossbill]

I think I made that firewall pic, but it's highly degraded.
Here is the original.

[Ashley]

Hi: Jeff, my bad on original post, I did post as a non-air, it came equipped with factory air. Trying to eliminate all factory air holes in firewall. Thanks to all for posting photos.

[J_Speegle]

Hi: Jeff, my bad on original post, I did post as a non-air, it came equipped with factory air. Trying to eliminate all factory air holes in firewall. Thanks to all for posting photos.

Then look above the heater motor area. Towards the top of the cowl. You may find a screw hole just under the pinchweld (firewall to cowl top) for the hose strap. Then to the outboard of that and very slightly downward for two holes (horizontal one to the other) for the valve that connected to the heater hose and shut off the water to the heater when the AC was on.   Would post a picture but trying to keep the AC and non-AC separate and sometimes people in their rush don't read the captions