The Trans-am nose on my firebird is a fairly blunt area too. I'll get better pics tomorrow, but it's basically a slightly V-shaped wall:
And the T/A kit gave the firebird a .32 Cd stock. Compared to the .36 I think the regular Firebird had. And some variations of the third gen Camaro had .29 Cd I believe (you can find this info on thirdgen.org under the camaro or firebird tech data link).
One trick my dad used on his '74 Camaro (with the later Z/28 "rubber bumper") back in his bracket racing days, was a set of lexan covers for both the head lights and turn signals, and it made some significant changed in both the car's ET and trap speed. It was a consistent high 11 second car on street tires and pump gas... And it drove to the track, and drove home, walking all over many trailer queens...
Very similar to his set up. Had a boxy hood scoop though.