When it comes to the torque of an L98 cylinder head, it depends on a few factors. The most important factor is the camshaft profile that you choose for your engine build. Generally speaking, when selecting a camshaft with a higher lift and longer duration, more torque can be generated by the cylinder heads. This is because these cams will create a larger valve opening area at peak lift which allows more air and fuel into the combustion chamber resulting in greater power output. Additionally, other components such as valves, pistons, connecting rods and intake manifolds also contribute to how much torque can be made from an L98 cylinder head. It’s important to note however that some aftermarket performance parts may require special tuning or modifications in order to reach their full potential when used with this type of engine block. In any case, depending on these various factors mentioned above an L98 cylinder head should typically have around 350-400 ft/lbs of torque available for use during normal driving conditions.