TXGunNut said
At the risk of beating a dead 1/2 horse I found it interesting that Ford part numbers for the 1997 F150 (introduced about May, 1996) utilized a prefix of F65Z instead of F7TZ. In the Ford part numbering system F6TZ is a 1996 light truck and F7TZ denotes 1997 light trucks, I suppose the F65Z prefix was a nod to the “1/2” crowd. Many of the early Mustang parts use a C5ZZ prefix, parts carried over from the Falcon commonly used the C2OZ prefix. When I got into the Ford parts business in 1978 most of the parts for the “K” option were still listed in the microfiche but many were obsolete by then. I don’t recall the “K” designation being used much if at all in the ‘fiche, just a vague reference to “special”. I remember the stir when Ford sent some NOS 427’s to the local remanufacturer for disposal. 

Correct me if I’m misremembering, Chuck, but I always felt there were three significant variations of the 65 Mustang. The earliest had 260’s and generators. Second had 289’s and alternators but I can’t recall what changed later in the year that led me to the conclusion about a third variation. Like Winchester, changes happened at various times but Ford catalogs would always note the date of a component change. The date was generally correct in those days. Today’s e-catalogs utilize VIN decoding and Ford claims to use the same numbering system but the youngsters assigning part numbers never learned to use the system. 

 

Mike  

I am not a Mustang guy but, the early production cars, I believe could have been 6 cylinders, 260’s or 289’s?  The early production cars did have the generator.  The C code 289 was a 2 barrel and the A code was a 4 barrel.  Later in 65 the K code was available in the Mustangs.