Hello.
:welcome
In the 67 model year you could get the GT package on C code cars. The GT package was really only cosmetic in 67, but, they would happily put it on a C code car. On the 65/66 cars, they only put the GT package on cars that also came with a 4bbl, but, in 65/66 the GT package actually meant a little something. You got front disc brakes, dual exhaust, better suspension, and quicker steering along with the stripes and badges. In 67, it was basically just the stripes and badges.
In the 67 model year you could get the GT package on C code cars. The GT package was really only cosmetic in 67, but, they would happily put it on a C code car. On the 65/66 cars, they only put the GT package on cars that also came with a 4bbl, but, in 65/66 the GT package actually meant a little something. You got front disc brakes, dual exhaust, better suspension, and quicker steering along with the stripes and badges. In 67, it was basically just the stripes and badges.