Hello mate the truck looks great in blue, good job on the painting I just built my first king hauler and first time painting also - it's not easy!
I reckon you should take a look at some of the aftermarket accessories you can buy and customise this truck before building something else. Check out
www.gardentrucking.com, and google 'custom big rigs' for inspiration. I suspect you'll be spending some $$$ in no time!
Matt.