Our reproduction plug wires were stiff, dried out, and long-past needing replacement, so adding the Pertronix 7mm black plug wire kit (PN 708
104, $51.40) to our order was a no brainer. The safest way to install plug wires is one at a time. We generally start with cylinder No. 1 and work our way around the distributor. Push the wire terminal completely into the distributor cap's opening and then slide the boot down into place.