Re: Burning spark plug wires
is the body of the sparkplug discolored? perhaps the sparkplug is loose (believe it or not, i've seen this happen before, the boot didn't get burnt but the wire did).
an exhaust leak will trash plug wires in short order. a spray bottle filled with windshield washer fluid works to find exhaust leaks. they're also good for vacuum leaks, squirt and listen for rpm change.
"You know you're a yooper when the only way you can balance your tires is by cutting off lugs".