Mike, Lower resistance in the plug wires does not necessarily mean ''better'' spark, but you might say it provides ''longer'' spark. The higher resistance wires provide a longer spark duration, which is beneficial in many engines and has been in use now for quite a long time. My advice is to use the same type wire the manufacturer used originally. I believe at least the earlier letter cars had traditional stranded copper wire core, and I just put a set from Andy Bernbaum in my 'C.' But I'd welcome input from others as to whether this type wire was original with these cars. Park Waldrop C cpe - Atlanta