Originally Posted by Frank Lee
My '59 has 40+ year old wires and points and it runs grrreeeaaat!
Most of those old wires were a solid metal core. Conduct great but cause radio and other electrical interference. New wires are usually a graphic strand (I think) that are noise suppression.
As for replacing plug wires, just check the ends for corrosion and then do an ohm test. Might not hurt to ohm a few sets of new high quality plug wires in a store and use that as your base...if your old wires start to get more resistance than that it is time to replace them. Also look for cracks where they can arc to ground along their length.