I lost all of my good lookers before I even got on my trip. PS front tires must be original tread , no retreads alowed. Run the motors hot, check the brakes under stress, a std tranny needs to be able to downshift as emergency brakes, and double clutching is typical. Remember this is a medium to big size truck and will drive like one. Mine has a nose, flat fronts are good, but rear engines don't have a rear cargo door.
Air brakes are great with any wieght.
Hyd brakes are ok. They tend to get hotter more often.