Hi all, Got a ‘71 NY here that I’m trying to fix the dash on. The PO backed the middle of the dash to put in a double din navigation unit and I’m trying to fix it. I have the original radio, but I have no idea how it’s supposed to mount and secure in the dash. There’s a hole. I see the two holes in the cluster support bracket where the nubs on the factory radio would slip in, but there’s no way I see to secure the radio to the cluster bezel, nor is there anywhere in the void in the dash to bolt the radio to secure it. What am I missing? Also, of course the wiring has been hacked. I’ve figured out where the power wire is, and the positive to the speaker, but as far as the ground for the radio and speaker go... The ground is currently run to a screw tapped into a support bracket for the steering column. Can I use this for my ground? This is a ‘floating ground’ setup, and I’m not sure if that will work or not.