Not to sure about the Level 5 rating. I understand that Revell has changed their method. The earlier issue that I have is #85-7679 that was listed as a Thunderbolt Street Machine and is listed as a Level 2. From my personal experience, and what I have seen from other builders on the forum, it is a very good kit with several building options and not a difficult one to build. As for the 7 hours. I usually have that much time in test fitting various assemblies and body prep. I have know idea what you have in mind for your build but I think you will enjoy this kit. Maybe you will share your build on the forum.