Head bolt torquerefers to the amount of rotational force that must be applied to the cylinder head bolts for a safe and secure connection either to the engine block or another cylinder head depending upon the engine. After the desired torque is reached, some bolts then require further rotation...
LS9: 9 bolt The crank shaft on the LS series engines does not extend aft as far as its older small block bretheren thus a crank shaft spacer/adapter plate is required if using a previous generation automatic transmission and torque converter. ...