That cam gear is on tight which is good for operation, but bad for removal & re-install. Now I really recommend a new cam gear, you're going to lose metal off the gear when you pull it. From what you say you are putting in a new cam. If so, the gear is about $25 and a good parts store can steer you to a shop that will put it on for a small sum.
If you must pull the gear, you can use a puller for the harmonic balancer. Most are set up to pull with a two or three bolt pattern. If so, you should be able to use it to pull the gear. Use the biggest bolt that will fit thru the puller with washers and nuts for the screw access holes in the pulley. After this is all set up and ready to pull, heat the gear and it should pull right off.
But this brings up another question: How are you then going to re-install the gear?
