OK this has been covered a million times. But the typical idle smell is happening.
The cam is not very big, #s are .613/.576 227/234 115, this has very little overlap. When I make idle around 16:1 the smell goes away. But as soon as I set it back to 14.7 or turn on the o2 sensors which switch around 14.7 it gets a little smelly again.

Is this just something that can't be fixed or does it seem like there is a mechanical problem with the car? That cam profile is odd to me so I'm not sure what to think. Stock LS6 with headers exhaust etc.. I won't lose any sleep over it if there is nothing to be looking at.