Here are pictures of the Allison 1710-39 F series V12 engine used on the P-40D/E or Kittyhawk Mk I/Mk Ia, according to the info I've got(short nose).
The one you show was used on the early type(long nose) P-40B or Tomahawk MK II, the Allison V-1710-19 engine.
The P-40 of the topic is defenitly not a P-40B and if Brittish most likly a P-40E or Kittyhawk Mk Ia , due to the 6 .50cal machine gun ports, the P-40D/ Kittyhawk Mk I only had 4.
If it is a model I have to agree with adrian that this is a real masterpiece.
And the guy knows how to use photoshop.
But if real and I do believe it is, it is nice to see it is in such a great shape after so many years in the Sahara.