The rear 3/4 shot is the only undoctored shot of the ST. The other two feature an artificial gravel driveway. The dead-giveaway to going under the Photoshop knife is the repitition of patterns. Even though all three pictures appear to have been taken on the same day, in the same location, within mins of each other, the head on and front 3/4 shots are doctored. You can see some of the original gravel driveway under the Trac in both pics.
Regardless, the Trac itself looks unaltered in anyway, including the grille guard.
EDIT-
Actually, all three pics have been altered...just the rear 3/4 is a lot more convicing then the other two.
The Trac wasn't copped into the background, distracting background elements have been cropped out. The reason why it looks so 'strange' is due mostly to the shadow up underneath the Trac.