how high rpms on 360

i have a 73 duster with rebuilt 360, mild cam, edlebrock intake, and 4 barrel carb, petronix ingiter 2 with flame thrower coil, hooker headers,904 auto trans, and 8.75 trans, just trying to list all info for help with this. when running through gears how high can i take the rpms on tach before i run into danger of hurting engine? thanks