"I have no idea if it is genuine or a replica someone decided to make out of a spare Essex...I shot her at a car show in Dunedin (New Zealand) a couple of years ago."  
Submitted by IRR.Com Forum member "45 Below".

The rushed and somewhat out of focus picture above (they don't like you taking pictures of the engines) on the right is a same-side view of the 2005 version of the injector cover/plenum as compared with the 2004 3-liter version above it.

The other picture above and  on the left is a 2004 3-liter version, and relates to the two  left side shots two and three pictures above it.

Here is the entire 2005 3-liter Chevy IndyCar engine either on its way in or out of the Tomas Scheckter car at HMS. I suspect it was the engine/car to be used for the oval track portion of the test. Note how small and compact the clutch "package" is in the lower right corner of the picture, amazing that it can harness over 600 horsepower and hook it to the ground through a combined 30 inch wide Firestone tire contact patch. The cam cover appears to be almost identical to the one shown on the small picture above left, indicating that if there are new cylinder heads, they are at least same-size.

Scott Dixon calling, he thinks all this this engine speculating/conspiracy crap is just BS!