I finished changing wires and plugs on v6, factory stuff hard as crap to get wires off.
I tried at first just pulling by hand ,I almost gave up for the day. Looked around and found a Goose neck Wrench
15/16 "one side 1"other closed 12 point, I then slipped the 15/16 over wire,boot & metal shield. I added pressure
against the boot & wrench with my fingers while applying leverage and WALLAH boots pops off plug>