This build is lame.

I think what it needs is direction...
Kinda hard to build if you have no new parts. If that new job works out, you'll probably have more available funds.
Looks good. Can you pick anything up?
When I fired mine up for the first time, I heard some mexicans speaking Spanish. Definitely made sure to inject a couple puto and jotos
What's behind the ash tray that keeps you from putting it further back?
There's some AC stuff back there. Ducts and stuff. They can be heated and pushed back but only about 1/8" and that wouldn't have been enough to flush mount it anyway so I just left it as is. Doesn't look that bad when you're in the truck and I'm happy with it.
Modifying it how?