I'm not saying that it is or is not a touched photo, BUT!, I think the shadow by the pole might be coming from someone or something standing just outside the frame. The guys face puts the proper shadow on his shoulder, all of the fence post, pole, guy, seem to have light coming from the same direction. As for the hold down straps we are talking about "Momentary thrust in all directions". Strange things can and do happen when forced air induction systems are unbolted from intake manifolds that quickly.................I bet you're right; the shadow cast by the light tower doesn't match the shading on the air scoop.
I went to the local Chevrolet dealer recently and they had one on the showroom floor. Looked great!