I slide in the outer casing that comes with the head unit into the din opening and then bent the metal tabs out to secure it in place. I then just slid the head unit itself down into the casing. That method the outer bezel goes on over the HU.
I have gauges installed in the bottom opening so I no longer have that pocket with the bracket.
"torque gets you off the line...& hp gets you over the line." - TTKeeper