I wouldn't worry about changing the intake, I've gone 10.60's with a box stock Hurricane on a 383.
You need a bigger cam. That cam is done way before 7000 rpm. Check out the Comp 12-908-9. It hauls a$$ in a engine such as yours. Specs are:
300 in/308 ex adv. duration
264 in/270 ex duration @ .050"
.630 in/.630 ex gross lift
106 lobe centers (I'd advance it 4 degrees)