Thanks DAWG, I probably will stay with the 113...I use it as a daily rider and for touring, so while I want more power, I don't want to cause any problems for myself. It has 10.5:1 compression now, and I have not had any overheating problems at all. I'm running Amsoil with an oil cooler, and the operating temperature is always around 210 degrees in this 95 degree weather. The only concern that I have about the 657 cams is that the stated maximum lift cams for the 103+ heads is .65. Will the heads work, or can they be made to work with these cams? I appreciate your help/suggestions. I would like to see what the Zippers 113 will do. I wish they would hurry up and finish it. I'll wait a little longer and see...