Rock Auto lists two AC-Delco part #'s for plug wires for these engines. The "OE Fit" 746T set is an exact fit set and ready to install out of the box. RockAuto wants $58.xx for those. The "Professional" 9746T set is a "Universal fit" set that needs to be trimmed and have the end terminals reinstalled. Those wires need lots of dielectric grease in the boot, and especially around where the wire comes out of the boot to keep water and contaminants out of where the terminals join to the wire core. Personally, I never use the "professional" sets from AC-Delco. You can have issues with the terminals working loose well before you need to change your Iridium plugs