I found this when I removed my supercharger. The Fel-pro gasket leaves a gap at two points on the wastegate leaving a path to cavities on the underside of the SC. It was this way when I took it off, and my new gasket has the same issue.
The runners were the same color as everything else... really dark brown. The dark stuff on top of the LIM felt like thin gritty oil, and wiped right off for the most part. Couldn't tell you about fuel smell, I had a bucket full of it next to me at the time.
Yuppers. Remember it well. It'* not even remotely possible for them all to be equal. Particularly the 5 and 6.
A little history on the unit we're looking at.....it was purchased from FLOZ in disguise. Unbeknownst to John. It'* part of a Gen3 conversion. John has been battling tuning issues for the last year with it.