looks like it's ported pretty well already. the hump is gone from what i can see. if you go too far on the bottom you'll go through and hit the little coolant reservoir under there.
knife edging the blade is kind of debatable. i don't think it really does much and it can lead to idle issues if you go a tad too far.
you could epoxy it, but a few people have had the epoxy chip off over time and then find it somewhere further down the intake.
best thing to do is half-shaft it if you haven't already. i did that and then even flattened out the other side. definitely makes a better path for airflow.
like this kinda:
http://www.allfordmustangs.com/forum...how-shaft2.jpg