David, here a couple of pics I just found on eBay. Since our FG dashboards are swept back at the bottom, it makes thing diffacult to mount these DIN style units.
As you can see, mounting the unit level will expose the sides. If you mount it flush with the bezel, you'll have problems with the back of the unit interfering with the heater controls and cables. I've seen some mount them flush, but I can't help but think of the problems they have.
I mounted mine level with the aid of an adapter I purchased from Crutchfield. This is the adapter I used:
It's also American International part #CGM390M for the '95-up Chevy Caprice.
Since I have a '69, all I had to do is after I cut the opening out was to glue it in. The '69 bezel and this adapter are both made from ABS so ABS cement was used. I don't know if ABS cement will be needed for your install. I don't know what the '67-8 bezels are made out of, so you're on your own to figure out what bonding agent will work best.
I would suggest finding a spare bezel to make practice cuts and fitments with. To make the cuts, I used my trusty Dremmel and some cutting disks. I have some pics on my desktop PC of the installation of the adapter on my dash. I'll add those early tomorrow for ya.
Once you get the adapter secured to the bezel, and mounted to the dash, make sure it's not going to interfere with anything. Then support the back of the unit. Then ya should be good for the final hook ups.
