The type of gasket you'll need depends on the valve cover you have. The type of head doesn't matter and yes, the 7120 was fitted from '91-95.
Valve cover gaskets come in two flavors; a cork gasket that fits inside the '87-'95 aluminum valve cover, and a synthetic rubber gasket with steel supports that fits with the '96-'06 steel valve cover. Yours is probably the latter of the two.
When replacing the old gasket, make sure the mating surfaces are clean and free of old gasket material to prevent leaks. Apply a thin film of RTV silicone on the upper gasket surface only and the valve cover contact area. Allow about 15 minutes for the RTV to become tacky, apply the gasket to the valve cover, and rest on a flat surface with the gasket on the bottom with the weight of the valve cover on top. After 15 further minutes the gasket will be firmly in place and this will make reinstallation of the valve cover on the head much easier. There's no need to apply RTV on the head surface nor the lower gasket surface. Just torque the bolts correctly so as not to crush the gasket.