[Spridgets] Off topic Mustang code?

[derf]

 Ah, the popular K-code Mustang question. Well, the simple answer is
the K-Code was a 1965-1967 Mustang that came from the factory with a
special 289 High Performance cubic-inch engine beneath its hood.

Buyers of the GT Equipment Package could add the K-code to their new
ride for an extra $276 back in 1965. The cost to add this engine to
new Mustangs without the GT package was $328. The K represented the
engine code on the VIN number of these Mustangs. The K-Code engine was
first introduced by Ford in 1963, and was featured in cars such as the
Fairlane and the Comet.

http://www.vintage-mustang.com/topics/decode/decode.html

A code is probably 289 4V carb.