Yep those right side plugs are difficult. I used a piece of twine and made a slip knot and worked around the rubber plug boots and then gave it a pull to get the boots off of the plugs. I did this several times while both changing plugs and wires. ALso used the u-joint type of extensions with two other long extensions to get to the plug socket around the plug.
Don't forget to blow out the area around the plugs with compressed air first to remove gravel and dirt etc before taking out the plugs. You don't want that nasty stuff going down the plug hole.
I've always brushed a little hi-temp anti seize compond on the threads of the new plugs before re-inserting them. I stripped the threads out of an aluminum head years back so I've done that ever since.
Good luck