[Agentarrow]

If it's no longer used for towing robots, swapping for better batteries and a more powerful drive motor would be cool. Add a couple of speakers to it so that when you press the horn (or another button) the speakers play a loud V8 rev followed by a thunderclap. That would be a great way to give it a grand entrance to any demonstration.

Edit: I warn against too many lights. While strobes can be cool you don't want the truck to look chintzy and you don't want the lights to be the center of attention. The truck is the cool part.