Not much of the source was used but I do think some elements of this chop are strong. The car is pretty much perfect. The lighting and tone fit right in. Honestly it doesn't even look Photoshopped - it looks pretty real. My biggest problem is the chest, shoes, and crown. They are too warm in tone and do not have that "hazy" look of the rest of the shop. A few things that may work. Put them all into a group if you can. Then clip an Exposure Adjustment Layer and mess with the "Offset" slider - probably to the right to make it hazy. Be careful, this slider is WAY sensitive and you may have to do it very little. Now, since the crown is even less hazy, you may have to do another Exposure Offset on it alone. Then try to maybe make it more blue or even blue-green in tone. A color Adjustment Layer may do the trick. If you want to get nit picky, you may want to flip the hat horizontally so that it's properly aligned. If you don't or can't do that, maybe some warp may make it fit better. Really good job with the shadows on the car and chest - plus points for that. Since the ground is wet, maybe some reflections from the car and chest? I really don's know how they would look but it's worth a shot even it they are VERY subtle. Also if you want to get even more nit-picky, take a dark brush sampled from a dark color in the road. Brush it ever so gently at a low opacity to take out some of the shine in the road that is around the chest. I am suggesting this because the light is being filter in through the trees and the chest would block that light some, so you would not have that road shine.

The road brushing I suggested should be done under the shadow layers.

He'd never be able to drive that car if it has a clutch... FLEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE (couldn't resist)