SFM6S1825 GT350H on auction - Automatic, 148K miles

[J_Speegle]

I wonder what that big hole to the left of the wiper switch is?

Likely for a switch for some purpose. Not unusual to find one added to a Shelby or any other hot rod of the period. If the switch is gone, along with the wiring it will be difficult to figure out why but there may be a clue somewhere under the dash

[FL SAAC]

I wonder what that big hole to the left of the wiper switch is?

Good catch

Our dash is still intact, absolutely no holes.

Probably a switch for an electric pump, horn switch, brake light cut offs, fog lights at one time?

Dealing with old cars that have been put through a lot during their existence.

[6s1640]

I wonder what that big hole to the left of the wiper switch is?

It is a reasonable probability it is the parking brake warning light hole. Either owner, HERTZ or Ford dealer installed.  However, it seems to be too high on the dash.  I know when they were installed, the technician butchered the hole, so the hole location might have been subject to interpretation too.

Cory