Question for you, why didn't you use the temp sensor in the Y-pipe? The temperature differential between the MAF and what was actually going into the cylinders would be quite substantial. I would think this would affect the AFR. Also, I too would like to see pictures because the whole front of the engine is different between the two and as far as I've been able to determine, it isn't as simple as knocking two ribs off the belt and putting all the pulleys on because they are in physically different locations and some don't even have a place to be mounted on the N/A water pump. Maybe I've missed something but my car is tore apart right now down to the guts and I don't think I'm seeing what you're seeing.

Thanks