I was taking the plugs out of my engine just to see if they needed to be changed, and of course the first plug wire I piulled off tore off at the plug end. I recrimped the connector on whatwas left as best I could and the truck seems to run fine, but since then I occasionally get an SES light that wil eventually go away and the mileage seems to be down some, so I'm guessing my patch job didn't work as well as I'd hoped, so I need to get some new wires. Thing is, I just want some AC Delco wires and everywhere tells me there are two sets of possible wires denping on what the part number is on my coils. I can't see a part number on them from a visual inspection, and I really don't feel like taking them off the engine to find it. From the looks of it, it just looks like one set of wires is a bit longer than the other. Are there any other differences besides length?