Depends on your plans for the car..
If you see any sort of power adder down the road, especially a turbo.. then keep the 327's..
Im running 373's in my aode convertible, and run outa gear at 115mph or so, with 26" tires, in 3rd gear..
Not to mention the excessive tire spin.
For an N/A car that needs to be reved to 5800-6krpm go with 410's.. they should have you trapping in your peak power at the end of the 1/4 mile..