I'd probably wire the parklights for dual fillament bulbs so as to still have turn signals,and use those new halogen bulbs,or maybe even convert to LED's. (LED bulbs don't make near as much heat,and draw less current than incandescent bulbs,so they may require a special flasher unit for the turn signals to work.) Either way,get as much light as you can on the front and back of your truck;you can't be TOO visible.
Speed
