Well, I have the magnum heads and my home ported 596's. Both would keep the car running as smooth and polite mannered as it is now. 3.23's is still a nice street gear, especially with a stock converter.
I'm not saying you haven't been there or done that. I remember everything doesn't add up to something big each time. Like two tenths for this two tenths for that and for the other. Sometimes it just doesn't stack up that way...