Next stage for my 360 build?

In order to make power at 7000 rpm, everything has to be working togther for it. Chances are, the cam you'll need to use won't start making anything in power to a min. of 3500 rpm. This is way beyond your spec for cruising.

To help bridge the gap or, I guess I should really say widen the rpm range, use a Hyd. Roller cam for more of a RPM spread. I would look a split duration cam of about 230 intake duration. This, in general has a starting RPM of 2000. And should settle into a cruise RPM of about 3 grand easy.