Your block requirement is based on both your LBM and your activity level. Without knowing your LBM, I can't make a block suggestion. If you go here, you can quickly detemine both your LBM and block recommendation (use your current activity level adn if you change it recalculate your block requirement at that time): http://www.zonediet.com/BodyFatZone...fault.aspx
Your carb choices, even Zone favorable ones, play a large role in hunger. In addition to calculating your block requirement, I'd suggest to begin keeping a food diary. Include in it the timing of meals, the specific foods and amounts eaten and how you feel 4 hours after the meal. This will be very useful for eliminating the hunger.