Should I go bigger on the cam?

Well the car gets driven on the weekend, and have no emissions. My goal is to run into the 12 on the engine, and see whatever it will do with the nitrous. I would really like to get it high 11s on the Nitrous. Dont know if I got enough to get there or not. As for headflow, The heads befor flowed 252 at .500 intake and 160 exhaust at .500, I now have undercut valves, little more portwork and a much better valve job, hoping to pick up 10 or so cfm. will know in a couple days what all the flow # are.