I thought I noticed it go really rich on the initial hit in the video when I was at the track, but didn't really think about until yesterday when I was playing around a bit. As soon as I'd mat it it went right down to 11.8 - 11.9. I thought here is no way it's going that rich, but each time it dipped right down there and never came above 12.0 while it was WOT.
Those are numbers I look for in the '88 and the Chevelle, but they're both running high teens for boost on the street.