port and polish at a minimum. How crazy are you wanting to get with your truck?
You could tear into it and do a cam, but at some point you have to ask if you are starting with the right platform for a full build. You're probably never going to be a 1/4 mile king with a 5.2.
You have a heavy 4x4 so you're looking for torque more than horsepower. I would recommend a set of gears if you really want some bang for your buck. You could be a serious tire shredding stop light terror that way.