Topic: unknown holes in firewall

[S412gofast]

We are getting all in accord to install engine in 67 GT350 1341 and I now noticed the 2 holes circled in red.  Can anyone identify if these are factory or Shelby added or if I need to remove them.

Thanks
Carl 

[jwc66k]

Slightly off topic, but I notice the unevenly spaced holes on the firewall for the export brace. Have you?
Jim

[RoyceP]

No telling why there are holes there. Not factory and not typical of any 1967 Shelby.

[Bob Gaines]

We are getting all in accord to install engine in 67 GT350 1341 and I now noticed the 2 holes circled in red.  Can anyone identify if these are factory or Shelby added or if I need to remove them.

Thanks
Carl

You need to remove the holes if you want the firewall to look factory original.

[Bob Gaines]

Slightly off topic, but I notice the unevenly spaced holes on the firewall for the export brace. Have you?
Jim

The cowl brace hole pattern in the picture is typical of 67 Mustang.

[jwc66k]

The cowl brace hole pattern in the picture is typical of 67 Mustang.

The topic is about a 67 GT350.
Jim

[Bob Gaines]

The topic is about a 67 GT350.
Jim

The hole pattern is the same regardless of it 67 Mustang or GT350. 

[jwc66k]

The hole pattern is the same regardless of it 67 Mustang or GT350. 

Thanks for the clarification.
Jim

[Bossbill]

Oddly enough my Shelby, built in the same week, has a similar punched in hole.

I'll have to run a screw through it, but thought it was for the ground strap, albeit incorrectly located.

Are there any late February or early March '67 SJ cars with similar holes?
(I need to check the parts car as soon as I get over this cold).

[Bossbill]

Mine is further over than Carl's pic.
What is weird is that the holes are not drilled but punched leaving a crater.

I'll dig into my disassembly pics and see if there is anything there.
So far it's just an odd coincidence and that our cars are not that far apart on Ford build date.

Update pic to add red circle.

[S412gofast]

Mine is further over than Carl's pic.
What is weird is that the holes are not drilled but punched leaving a crater.

I'll dig into my disassembly pics and see if there is anything there.
So far it's just an odd coincidence and that our cars are not that far apart on Ford build date.

Bill I am thinking like you on this.  If someone wanted an extra hole in the firewall they would just drill it.  I do not think it is easy to create a hole like we have on our firewalls by punching method in these radiused areas to result in a hole within a depressed crater. 

[jwc66k]

I'm reluctant to drill a hole in the firewall as I don't know what's on the other side. An awl or punch "seems" safer.
Jim

[Bossbill]

I thought Ford liked to do punched holes since the metal deforms and splays giving a lot more surface for a metal screw to bite.
This looks rather severe.

[Bossbill]

I found some pics of when the car was up for sale. Yes, I keep almost 40 year old pics. The hole was there with nothing in it.

This car once had aftermarket air due to its location in the deep south. Lots of holes had to welded up. If I put my smart cap on this may well have been a way to feed a 12V electric line directly in-line with the inside evaporator. It could also be a way to to send power to the A/C clutch.

Time to make that hole go away.

[jwc66k]

This car once had aftermarket air due to its location in the deep south. Lots of holes had to welded up. If I put my smart cap on this may well have been a way to feed a 12V electric line directly in-line with the inside evaporator. It could also be a way to to send power to the A/C clutch.

Elementary, my dear Watson.
Sherlock.