1968 Shelby GT500KR: Ultimate In-Depth Guide

History, Specs, Options, Performance & More

1968 Shelby GT500KR

At the 1967 New York Auto Show, Ford introduced the most powerful Shelby Mustang ever. The 1968 Shelby Cobra GT500KR was a mid-year introduction, based on the 1968 Shelby GT500. Ford added ‘Cobra’ to the Shelby’s moniker to help usher in the beginning of a new performance era at the company. The Cobra name referred to the new 428 Cobra Jet V-8 that was planted under the KR’s custom fiberglass hood. It was the engine that would once again vault the Mustang to the head of the pack.

GT500 KR represented Mustang’s evolution of Mustang from both Shelby’s and Ford’s standpoint. In 1967 Ford redesigned the Mustang to allow both big and small engines and by 1968 the 428 Police Interceptor FE big-block was on the option list. These Production R-code Mustangs featured front Super Cobra Jet Engines, disc brakes and a functional ram-air scoop which served as a good basis for the Shelby Mustang 500 KR.

Shelby’s Mustang offered many improvements for a customer demanding a ‘King of the Road’ Cobra. A redesigned front end, hood and rear end, with 1967 Cougar tail lights, were manufactured out of fiber glass. While the fiberglass helped reduce the weight of these components, the 1967 body style was much larger and heavier than preceding models. As an example of how good Shelby-Ford relationship was, the car send to Shelby did not have hoods or front ends.

Interior appointments were very similar to the deluxe interiors delivered by Ford. Shelby only installed a functional roll bar and a wood-rimmed steering wheel.

Ford conservatively rated the 428 CJ at 335-horsepower, but in reality it made more than 400-horsepower and 440 pounds-feet of torque. The KR model was also equipped with a modified suspension and was offered both in fastback and convertible models. Ford dealers sold 1,570 GT500KR models in 1968, 1053 fastbacks and 517 convertibles.

1968 Shelby GT500KR Convertible

1968 Shelby GT500KR Convertible

In 1968 for the first time, handsome convertible variants of both the GT500 and GT500KR appeared. 318 Shelby GT500KR convertibles built in the 1968 model year. For passenger protection a padded roll-hoop was added just behind the seats which also acted as an attachment points for the seatbelt.


GT500KR Fastback: 933
GT500KR Convertible: 318

Retail Prices

GT500KR Fastback: $4,472.57
GT500KR Convertible: $4,594.09

Specs & Performance

type Professionally Tuned Car
built at Livonia, Michigan, USA
price $ $ 4,594
engine Cobra Jet V8
position Front Longitudinal
aspiration Natural
block material Cast Iron
valvetrain OHV
fuel feed Single Holley 735CFM 4-Barrel Carburetor
displacement 7014 cc / 428.0 in³
bore 104.9 mm / 4.13 in
stroke 101.2 mm / 3.984 in
compression 10.7:1
power 298.3 kw / 400 bhp
specific output 57.03 bhp per litre
bhp/weight 247.07 bhp per tonne
torque 596.56 nm / 440.0 ft lbs @ 3400 rpm
body / frame Unitary Steel Monocoque w/Fibreglass Hood, Nose and Tail
driven wheels RWD w/Traction-Lok
wheel type Cast Aluminum Alloy
front tires F60-15 Goodyear
rear tires F60-15 Goodyear
front brakes Discs w/Power Assist
rear brakes Drums w/Power Assist
front wheels F 38.1 x 17.8 cm / 15 x 7 in
rear wheels R 38.1 x 17.8 cm / 15 x 7 in
steering Recirculating Ball w/Power Assist
f suspension Wishbones w/Coil Springs, Tube Shocks, Anti-Roll Bar
r suspension Live Axle w/Semi-Elliptic Springs, Tube Shocks
curb weight 1619 kg / 3569 lbs
wheelbase 2743 mm / 108.0 in
front track 1476 mm / 58.1 in
rear track 1476 mm / 58.1 in
length 4663 mm / 183.6 in
width 1801 mm / 70.9 in
height 1316 mm / 51.8 in
transmission Top Loader 4-Speed Manual
gear ratios 2.32:1, 1.69:1, 1.21:1, 1.00:1
final drive 3.25:1
top speed ~212.39 kph / 132 mph
0 – 60 mph ~6.8 seconds
0 – 100 mph ~14.6 seconds
0 – 1/4 mile ~14.0 seconds
fuel capacity 60.56 litres or 16 gal.
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