I think you can get 305 without doing a cam. to my knowledge a full exhaust and intake with a gen 5 supercharger and 1.9 rockers with a 3.4" supercharger pulley will get you there.
I am looking at avoiding the Gen V supercharger for now as I am a broke college student. I may purchase it later in life when I can afford to really add performance. Thank you for your reply.