the Sound System...
I was looking for a basic sound system for this truck and didn't want to spend a lot of money.  I'll show you here what I put in and how I did it, and the overall installation came out pretty nice.
  
DISCLAIMER: use of this information is at your own risk.  Mascot Graphics takes no responsibility for interpretation of this information, and it is to be used as a guide, not an instruction manual.  All modifications were done knowing the risk.