[Nova Research Project]

The holes across the top are the following sizes.

3/16" x 5/15" for mounting to the firewall.

The slot for the radio hood ground is 1/4" x 1/2"

The switch mounting holes are 1/4" in diameter. Punched 1 1/8" on center a part.

The left set are 7/8" from edge to center.

The Right set are 2" from edge to center.