Those are really good times for 3:21's and stock 20's. Goes to show just how much benefit you've received from your mods.
I noticed your better time was about an hour later. I'm guessing this has to do with a combination of slightly cooler air and the computer is adjusting away from DD activity.
Or do you do the chefred thing (reset the computer and drive it like you stole it) before going to the track?