320whp out of an NA V6 on a dyno dynamics is amazing semtex, nothing to sneeze at. I'm going to get tuned on the same MustangDyne Dyno I got 310whp (HPLogic) on. According to your theory I should only pick up a few hp.. maximum maybe 10whp?
I think you have the strongest N/A car on the boards, congrats...for now. Don't pop the champ till Sat