What quarter-mile times did the 1968 Shelby GT500-KR run in Hot Rod's test?

The 4-speed fastback's best was 14.01 seconds at 102.73 mph; the automatic convertible's best was 14.58 seconds at 97.71 mph (after removing belts and the air-cleaner element and adjusting tire pressures to 45 psi front / 32 rear).

What engine specs are listed for the GT500-KR?

A 428 cu. in. OHV V8 with 4.13 x 3.984 in. bore and stroke, 10.6:1 compression, 335 hp @ 5200 rpm, 440 lbs.-ft. @ 3400 rpm, hydraulic tappets, single Holley 4-bbl carburetion, dual exhaust, .481/.490 in. cam lift, and 290° duration.

How much did the 1968 Shelby GT500-KR cost?

Base price was $4472.57 for the fastback and $4594.09 for the convertible; as-tested prices were $4857.13 and $5350.39 respectively.

What rear axle ratios were used?

3.50:1 with the 4-speed manual fastback and 3.25:1 with the automatic convertible; a locking rear was standard except with air conditioning.

What fuel economy did the GT500-KR get?

Fastback: 11.47 mpg best, 10.6 poorest, 11.02 average. Convertible: 13.58 best, 10.21 poorest, 11.96 average. Premium fuel is recommended for both.

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1968 Shelby GT500-KR Road Test & Specs - Hot Rod Magazine November 1968

Shelby GT500-KR road test: Cobra Jet hood scoops, functional louvers and cowl-feed venting

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Magazine road-test page on the 1968 Shelby GT500-KR (Cobra Jet) describing twin fresh-air hood scoops, functional rear hood louvers feeding the cowl vent grilles, interior squeaks/rattles, and the added center console.

AI caption July 2007 · Photo 10 of 66

This is page 41 of the November 1968 issue of Hot Rod magazine, part of a road test of the 1968 Shelby GT500-KR Mustang, tested in both fastback (4-speed manual) and convertible (Selecto-O-Matic 3-speed automatic) forms. The article text covers interior impressions (squeaks/rattles, center console, dash comparison to a Corvette), the Cobra Jet hood scoops and functional hood louvers, and drag strip testing at Orange County International Raceway. Best quarter-mile results were 14.01 seconds at 102.73 mph for the 4-speed fastback and 14.58 seconds at 97.71 mph for the automatic convertible. A full specification panel gives prices (base $4472.57 fastback / $4594.09 convertible; as tested $4857.13 / $5350.39), engine data for the 428 cu. in. OHV V8 (4.13 x 3.984 in. bore/stroke, 10.6:1 compression, 335 hp @ 5200 rpm, 440 lbs.-ft. @ 3400 rpm, single Holley 4-bbl), transmission ratios, differential (3.50:1 manual, 3.25:1 automatic), power front disc/rear drum brakes, suspension with Gabriel adjustable shocks and E70-15 Goodyear Polyglas tires, fuel economy figures, and dimensions (108.0 in. wheelbase, 3570/3740 lb test weight, 17 gal. fuel tank). A useful period reference for GT500-KR specifications and performance.

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Frequently asked questions

What quarter-mile times did the 1968 Shelby GT500-KR run in Hot Rod's test?: The 4-speed fastback's best was 14.01 seconds at 102.73 mph; the automatic convertible's best was 14.58 seconds at 97.71 mph (after removing belts and the air-cleaner element and adjusting tire pressures to 45 psi front / 32 rear).
What engine specs are listed for the GT500-KR?: A 428 cu. in. OHV V8 with 4.13 x 3.984 in. bore and stroke, 10.6:1 compression, 335 hp @ 5200 rpm, 440 lbs.-ft. @ 3400 rpm, hydraulic tappets, single Holley 4-bbl carburetion, dual exhaust, .481/.490 in. cam lift, and 290° duration.
How much did the 1968 Shelby GT500-KR cost?: Base price was $4472.57 for the fastback and $4594.09 for the convertible; as-tested prices were $4857.13 and $5350.39 respectively.
What rear axle ratios were used?: 3.50:1 with the 4-speed manual fastback and 3.25:1 with the automatic convertible; a locking rear was standard except with air conditioning.
What fuel economy did the GT500-KR get?: Fastback: 11.47 mpg best, 10.6 poorest, 11.02 average. Convertible: 13.58 best, 10.21 poorest, 11.96 average. Premium fuel is recommended for both.