Shouldn't have much of a problem with your setup against a mild bolt on LT1 car, assuming you're tuned good . I never had much trouble with less of a setup.
As for headers on an LT1, not sure what kinda gains they see with those.
The other day I drove/hot rodded a 95 Firebird Formula LT1/Auto car. It had a K&N, Hooker Headers, Fast TB, Ported Intake, Accell ignition box, etc. It was slower than **** IMO, then again comparing it to my vehicles isn't a fair comparision, I haven't had a stock GTP for a long time. Also, in its defense, in its 102,000 mile lifetime I think it always had the **** driven out of it...