Does an increase in airflow (intake or exhaust runner) move peak torque up or down the RPM band?

It's funny that the Boss 302 heads were brought up because I happen to own a pair. I was looking for a pair of 69 - 70 351W heads and a guy said he had a pair for a $100 but they tuned out to be Boss heads with new SS valves. Any how the runners and valves are huge, I could see them going on a 400 M motor easly.