I know this is an old topic, but if you're still interested:
Put a spark plug wire puller tool (rubber coated) on the wire, hold the tool tight with you right hand and use a long pry bar to pry the tool back, using the valve cover as leverage. I don't remember who showed me this, but everyone I show this too swears by it now. It's the best, fastest, and will not distort the wire ends at all.