What's my estimated power
 

I'm just curious about what kind of power I'll be putting down, I want to get as close to, or over 400 at the rear wheels with my 2000 m6 Formula. I have no access to a Dyno machine in my area so I just want to know from the subject matter experts here at ls1 tech. what I should expect with my mods.
Keep in mind I'm fairly new to the F-body world
My Mods are:
Free Mods, slp lid, K&N filter, pacesetter headers, true duals exhaust, LS6 intake, MS3 cam with new springs and push rods, 160 thermo., Spec stage 2 clutch with aluminum flywheel.

There are some with those exact mods in my area doing 40x.