Exhaust port porting?

I was only going to open up the last 1/4" to 1/2" up. That opening is 1.810w by 1.246h area of 2.255. My 1.81 valves have an area of 2.572. Was going to take the ramp out of the top and open the sides a tad. Would this be the wrong direction?
How I understand your post is that having a smaller opening than my valve opening going out of my head into my collector then into a big pipe is a good thing because it keeps the flow going better based off the thermal properties of expanding gas. And if I do want to increase any part of the port focus on raising the roof in the port and leave the dangling wedge in place?
also is the scavenging need as great with a boosted engine?