Cylinder head fasteners should not be neglected. Studs provide greater clamping load than bolts, but make head removal more difficult, particularly in the vehicle. Make sure that the fastener's engagement in the block is sufficient, and use sealant if the fastener goes into the water jacket. Torque the fastener to its manufacturer's specs, using the engine manufacturer's pattern. Cylinder heads are torqued in steps. Unless the fastener manufacturer specifies otherwise, I usually torque by first seating the fasteners, then work the pattern to 50 percent of the rated torque, then 75 percent torque, and finally, full torque. Be sure to lube the thread with the lube specified by the fastener manufacturer. ARP can supply new studs or bolts of very high strength material for most popular engines.