'66 Barracuda Radio Opening

Clearly my dash was hacked up by previous owners with aftermarket radios. The original volume and tuning knob shaft holes were sliced top and bottom and bent inwards. I've moved everything loosely back to where it should be. I'm either going to install a radio delete plate after welding up and painting the cuts or fully restore the opening to factory.

Just need to know the factory opening dimensions on a '66 Barracuda if anyone has them or can measure for me.

Much appreciated.
IMG_1855.jpg