Crunk Juice is also the name of a 2004 album by Lil Jon and the Eastside Boyz.
Re: tying the porch roof into the main house... I'll add I'd also go with 5/8 CDX ply for the roof sheathing. That added 1/8 goes a long way to resist uplift , and as you know wind in your area is a BIG issue.
Tying a New Roof Into an Existing Roof. How a new roof ties into an old roof will obviously depend on the existing structure and the planned addition. In fact, tying in is often not even covered on an addition plan, being left to the framers' discretion. But the process usually follows these steps: