I have the Super Six ported heads. I haven't done a good after dyno yet but here are my before and after 1/4 mile runs corrected for DA so that they can be compared. The after was on an initial tune by Lund before any data logging/tweaking was done. This was also done before I got the ported upper and lower intakes from Tom @ Super Six. I had traction issues before I had the heads installed and of course it got worse afterwards. I just got SVE drag wheels and M/T ET Street Radial tires but haven't made it to a track yet. I planned on going tonight to a local 1/8 mile but it got rained out. I'll probably be going to Orlando Saturday night.
2.168 - 13.618 @ 103.00 - before heads and intakes
2.176 - 13.387 @ 105.31 - after heads / before intakes