I got inspired today to test set of reproduction dated spark plug wires from a generally well-respected vendor that I had been warned were defective. Indeed a couple of them, including the coil wire, were bad, showing infinite resistance. The other "good" wires registered between 36 and 40 ohms. This inspired me to check a set of NORS Delco-Packard wires dated 1971 that I obtained few years back but had never installed on a car. Those all tested at 16-20 ohms. Meanwhile, the modern silicone suppressor wires on one of my cars tested at 7-10 ohms.
I could not find any reference to a resistance spec for the plug wires. Obviously the repro wires with infinite resistance are bad. But does the range of resistance in the others make a difference, or is that range all within spec? Ideally I'd like to use a couple of the good repro wires to replace a couple of the modern wires that are unnecessarily long and use the NORS set to replace the wires on another car with wires that are of unknown age other than having been on the car when I got it 13 years ago.