Welcome! Start a fuel log here at EM? You could add a partial or full grill block to that list, with shutters and the ability to open them within the car. Mooncaps on the wheels? Also, take off the power steering belt if you have PS. You will be amazed how unimportant PS is in our little lightweight cars, especially with your trucking experience.
Instead of deleting rear mudflaps, like I did, use them as the basis for rear tire strakes.