Ken,

Are resistor-type wires required by law for old vehicles? Is it illegal for a vendor to sell old style wires?

Bryan,

This type of wires/ends would have been used up to 1953. They may be resistor-core but I would guess they are solid core - call them, if it makes a difference to you.

In 1954, the solid-core wires would have been used but there would have been rubber covers at the spark plug ends.

Tim