Need help from the car audio group on here

Im going to be running dual 12" sundown audio subs (400 watts rms/piece)

and a aq1200 amp wired at 1 ohm (1200 watts rms)

I wont be pushing out the full 1200 watts, more like 1000 at most.

I have stock electrical system (no big 3 upgrade, stock altenator, stock battery)

So do I need any of those upgraded on my car to run my system safely?