One of the rarest, most unique parts on a Ford Mustang GT/CS is the tail light wiring loom harness. It has a purple tag near the passenger side (right hand side) tail light in the trunk. This tag has the FoMoCo label and the letters “SXR C8ZX-14405-A”. Here’s how this part number is decoded:
C8 = 1968
Z = Mustang
X = Ford special or experimental
14405 = Vehicle engineering number
A standard Mustang tail light wire bundle part number is C8ZZ-14405-E or C8ZB-14405-E. The GT/CS has the “ZX”, which is the code for the special edition Mustang.
All GT/CS California Special Mustang VIN’s began with the vehicle identification number prefix “8R01”.
Here’s how the prefix is decoded:
8 = 1968
R = San Jose, California assembly plant
01 = Designates the Coupe ( hard top) body style.
The next digit in the VIN # is the engine code. All GT/CS cars could have been equipped with the following engine options:
T = 200 6 cylinder
C = 289 2V
J = 302 4V
X = 390 2V
S = 390 4V premium fuel
R = 428 4VCJ 4 bbl
GT/CS consecutive VIN numbers begin with unit #119,000 and ended with GT/CS and High Country Special (HCS) #172,000. Most GT/CS’s were produced randomly in the assembly line-up with other Mustangs and Cougars. The highest concentration of GT/CS production occurred between February 15-20, 1968. This was primarily due to a massive wholesale dealer event in Los Angeles, California. By July, 1968, all California Specials and High Country Special production had ended and was phased out.