This is a complete set of ignition wires.  They have the threaded terminals on the distributor end of the leads.  This is a set of 8 wires plus the coil wire so 9 wires.  1966-1969...

This is the spark plug recommended for the 1960 onward through 1987 8 cylinder cars only. Sold Each From 1960 Silver Cloud II, S2, Phantom V, Silver Cloud III, S3, & Continental Shadow & T...