Hi Mark. Yes, you will need to get all those pieces out and you will need a new coil for thatplug. I wish I had a better idea on how to get it all out. Just keep at it, you will need rthe room for the new coil. It won't be fun getting it all out but I bet it will
run a while lot better!
Removing the valve cover won't help as much as you think, maybe you could use a long St of needle nose pliers?