hi guys i was wondering ,i have a 2001 2500hd with a 6.0 and i want to know if any body can tell me how many ohm's of resistance there should be in the factory spark plug wire's .i don't want to just arbitrarily replace them unless they need it .the plugs are new autolite the stock one's only lasted 45'000 miles so why spend the big bucks .any help on the spec's would be appreciated .