Father-Son 1974 Duster Project

One more thing from this weekend. This is a picture of our dash structure. The PO cut 2-2" holes I assume for additional gauges in the dash:banghead:. I'm going to weld patches back in those holes. Can anyone tell me if the hole to the left of the radio volume shaft hole is needed on a 74 and will the bezel cover it if not?
I may have a radio bezel in the box of wonder that was in the trunk of the car when I got her but I'm not sure.
I bought an instrument cluster from a member who said he is pretty positive it worked. But I would prefer aftermarket gauges for the car.