I tried putting the main sun overhead; but, just too bright. Also, defeated the purpose of having the lights on on the truck. Added a second sun overhead and was able to achieve the darker shadow under the truck and still maintaining the secondary long shadow. The quality of this image is low (and poor); but, wanted to save some time. I think I'll reduce the strength of the second sun from 1 to 0.75.
Finally, hopefully will be trying to achieve some mud on the truck and getting the license to show up.
Many thanks to both Ulco and Jochen for putting up with my many questions and helping me along the way.