1992 Pontiac Grand Prix changing back 3 spark plugs

The 'dog bone' motor mounts are designed for this situation. There are 2 of these at the front of the engine compartment. They are cast aluminum with an extra hole. You'll need to take the bolts out at the engine side and pivot the mounts up and out of the way. Put the bolt back in the hole of the bracket only on the passenger side. Put a pry bar in the bracket pulling on the bolt to move the engine forward. You will need to put the bolt on the drivers side in the bracket, through the dog bone through the extra hole. This will give you room to get to the back plugs.