Concours correct Autolite spark plug wires for any 1968 Mercury Cougar or Ford Mustang with 390-4V, GT-E 427-4V, or 428CJ engines and with thermactor smog systems. Black wires with 'Autolite', 'radio resistance', cylinder numbers individually imprinted, and dated 4Q67 (fourth quarter 1967) on the 7mm wires. Orange spark plug boots on this set.
Export cars, generally did not require smog in 1968.