Pre-torque the studs to about 10ft-lbs before installing the head. Use some copper spray on the gasket. When you install the head, torque it to ARP spec(which is 7ft-lbs, I believe), and then retorque after a couple heat cycles, or a couple hundred miles. It also helps if the head and block are perfectly flat. Check them with a straight edge and feeler gauges, and have them resurfaced/decked if necessary.