I am twisting and pulling and can't get the spark plug connector off. Any more tips? If the outside one is this hard I don't know how the middle ones are going to come out
It is tricky. Rotate them first a few turns either direction. If still they don't pop up, get a small piece of wood and gently lever between the block and connector. Be careful not to crack the connector plastic though!
It's a tricky operation no doubt about it. Only just enough room to get the smallest hands in there with the radiator dropped.