Hot Cam SS

Hello everyone. I took out the L99 and replaced it with the 376/480 Hot Cam. What a difference a cam can make. I also had Kooks 1 7/8 long tube headers and Kooks 3 inch cat back exhaust installed, all within the past couple of weeks. So the motor is still being broken in. Initially the car surged like crazy under about 3000 rpm (thought I was gonna need new brakes after only a week lol). Got her a tune and put her on the dyno and the surge calmed down. Car made 422 rwhp and 410 tq. I'm still looking to gain more horsepower. Any ideas would be greatly appreciated. Thanks in advance.