Date-Coded Spark Plug Wire Set for A-Body & B-Body 1968 273, 318, 340 V8 Engines & C-Body 1968 318 Engine, Date-Coded 1st Qtr 1968 (1-68). Mopar Authentic Restoration Product - all wires are stamped with date code (same as OEM wires); illustration shown may not show date codes, and is for display purposes only.