Looking at a 930 turbo 87, wondering what's involved in replacing the spark plugs

 

With stock headers all the plugs except the front passenger side are easily accessible. You will need a good wobble fitting and 9” extension for the one. When installing the new plugs be gentle and give a couple turns counterclockwise before engaging to ensure you do not cross thread. My 86’ is a dual plug and the top one on the passenger side is a huge pain in the a$$. Have fun with this easy maintenance.