Need a positive battery cable for a '70 Duster with a Slant 6/904. No problem finding one for a small block car. Besides maybe the length, are there any other differences? Any reason I couldn't use a small block cable? Seems to me as long as it has the heavy cable to the starter, smaller piece from the battery to the fender relay, and longer piece from the starter to the relay, it oughta work? Any differences in the starter/cabling/relay circuitry between a /6 car and a small block?