Is Your 1965-1966 a Real GT?

The information on this page applies to 1965 and 1966 GT Mustangs only. This is a list of information that we have collected over the years. To the best of our knowledge, it is both true and correct. However, we offer this for informational purposes only. We have learned over the years that nothing is 100% with a Mustang, so we will not be held accountable for you buying a 6 cylinder coupe that someone “turned into a GT”. We hope you find this information valuable.

Engine/Drivetrain:

1. There is no such thing as a 1964 ½ GT. That means if you car has a generator, then it is not a GT.

2. All GTs had 4 barrel carburetors. This means your engine code in the V.I.N. had to be:
     a. A=289 4v
     b. K=289 Hi-po

3. All 1965 "K" code GTs had manual transmissions. 1965 "A" code GTs could have been automatic or manual. All 1966 GTs could have been automatic or manual.

 

Suspension:

1. All GTs were equipped with the special handling package which consisted of:
     a. Stiffer Springs
     b. Heavy Duty Shocks
     c. 13/16" Front Sway Bar
     d. Quick Ratio Steering Box (Code: HCC-AX for Manual Steering and HCC-AW for Power Steering)

 

Interior:

1. Instrument panel would have included the gauges instead of the “idiot” lamps:
     a. 65 - this would have been an upgrade option.
     b. 66 - all cars had gauges.
 

 

Brakes:

1. Originally equipped with front disc brakes.

2. Requires a proportioning valve.

3. Because of the dual exhaust, the rear brake hose mounts in a higher location in the arch of the axle housing then the single exhaust. This is to prevent the rear brake hose from being burned by the exhaust pipe.

4. Mustangs with disc brakes had a much larger master cylinder then those with drum brakes.

 

Exhaust:

1. Dual exhaust was standard and exited the rear of the car through the rear valance.

2. There are reinforcing plates for the exhaust hanger studs on each side of the tunnel under the rear seat floor pan.

3. There are two bolt holes punched through the rear end of the rear frame rails. They are for the exhaust hanger brackets that support the trumpets on each side of the car. These holes can not be drilled after the car is welded together because the trunk floor is in the way.

 

Exterior:

1. “GT” emblems are mounted on each of the front fenders and the running horse emblems were deleted.

2. Individual “M U S T A N G” pin letters are located in a stripe that runs along the lower rocker panel.

3. Rocker panel moldings are excluded.

4. Fog lights are standard.

5. The holes in the radiator support for the fog lights are punched through the support, not drilled. Therefore, if the fog lights are factory installed, there should be a lip on the hole in the radiator support, not a clean drilled hole.