Date-Coded Spark Plug Wire Set for A-Body 1968 383 V8 Engine & C-Body 1968 383 & 440 High Performance Engines, 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.