I would say it's decent...I went 14.7 with 179whp/156wtq with 2.3-2.4 60'times and was trapping 94-96 mph.
Sam, the heads alone are not going to make the engine scream. You are going to need a serious flowing exhaust ie: headers/y-pipe/2.5" mandrel bent catback. Pulling 220+whp out of a small v6 is more difficult than you think. I'm not trying to discourage you, but it's to hard to speculate before the car is even running
I find(through skimming the boards)that most people have a hihger expection for 3 liters than what is actually delivered. This is all due to David Z's engine making 240whp. His engine was extensively modified, and had parts from actual race cars. I think if someone wants make serious power from a N/A 3L, then it's gonna depend on very good flowing heads, super high compression, and of course the vast array of bolt-ons that are currently offered for the 2.5.
You'll see tomorrow when I dyno, I'm not expecting to pull sick numbers as I never attempt to predict the unpredictable. But I do know what the car ran with 5psi of boost. That is what makes me happy, the fact that the car was able to dip into the 13's with ease on such a low psi setting. We'll see what she does my next trip to the track, she better not be slower as I'll drive it into the lake right behind Eric's car!