I have an Olds Silouette van. I think you have to remove the engine
completely, stand on your head, curse just right, and then, maybe, just
maybe, one could remove a spark plug boot, let alone the plug itself. Oh,
and the back ones, we'll I think they are permanent - not to be removed -
like the tag on your mattress.
As Charlie Brown would say, "AAAAAAAAAAAAAAAGGGGGGGGGGGGGGGG"