Disconnect the negative battery cable in order to remove the cylinder head. Additionally, if necessary, the intake manifold should be removed and the mounting bolt of oil dipstick tube taken off. Label all wires, vacuum hoses and spark plug wires for reinstallation purposes before disconnecting them. After that, remove the rocker arm cover as well as detach the pushrods and rocker arms from the exhaust manifold. Take a new head gasket and outline cylinder heads on cardboard and then loosen each cylinder head mounting bolt gradually. When lifting the head(s) off the engine be careful not to damage mating surfaces. The mating surfaces should be clean for installation and use a gasket scraper to remove old material. Look for damage and chase threads in head bolt holes. Place the new gasket on dowel pins with caution when positioning it on block. Apply Teflon pipe sealant to bolt threads and undersides of bolt heads; then tighten bolts in recommended sequence. Finally, follow through with the rest of installation steps while changing oil as well as filter.