Benny, when you remove the head bolts put them in order of removal, use a piece of cardboard Eg, cereal box etc, mark as Left front 1 Right front 1 make the bolt holes with the bolt itself that way your head bolt go into the correct order of removal, as you have stopped doing the removal, pour some oil down the remaining bolt this in-turn will help with the removal, use the proper socket or you will pay the price, also when removing the head do not lever with a bar this can cause damage elsewhere, last, make sure you put an oil covered rag into each port when the head is off.