1969 Chevrolet Chevelle COPO 427

One of America’s most recognized Muscle Car Icons, the 1969 Chevrolet Chevelle was produced with only minor styling changes, including new taillamps. With another record climbing sales year the Chevelle was on the rise and the SS 396 became an option package on all Chevelles. Now making it possible to order the SS 396 package on everything from the popular sales leading Malibu to the Chevelle 300-series and the Chevrolet El Camino pick up. The 396 engine option was offered again with 325, 350, and 375hp and in late model year, the 396 was bored out to 402 cubic engines, reportedly to meet new emission standards.

Interior of Chevelle COPO 427

Chevrolet produced a limited number of COPO Chevelles, specially ordered from the factory by specific dealers and a few select customers. Stocked standard with the L72 427 V8 rated at 425hp. An estimated 323 Chevelle COPO 427s were built.

Engine of Chevelle COPO 427

Chevrolet likewise eschewed flamboyant stripes and badges for their 1969 Chevelle COPO 427 and kept its appearance low-key. The car could run a 13.3 sec. quarter-mile at 108 mph (174 km/h). Chevrolet rated the engine at 425 hp (317 kW), but the NHRA claimed a truer 450 hp (340 kW). It has been said that the 1969 COPO Chevelles were "among the most feared muscle cars of any day. And they didn't need any badges.

(Source : Wikipedia; Oldsmobile)
(Pic sources : Iconocast ; how stuff works ;how stuff works2

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1970 Chevrolet Chevelle SS 454

The age of muscle cars peaked as the 1970s began, Chevrolet Chevelle SS 454 helped to herald the ascent. When GM lifted its displacement ban on midsize cars, Pontiac, Olds, and Buick responded with 455-cid mills with up to 370 bhp. Chevy's retort was a 454-cid V-8 that started at 360 bhp and ended at a barbaric 450. This was the muscle car summit. The wrapper was a restyled Chevelle that again presented the Super Sport as an option package for hardtops and convertibles.The SS Chevelle had a handsome new dash, and on the road, exhibited far more poise than its weight and size would suggest.

Engine of 1970 Chevrolet Chevelle SS 454

Specifications :
Wheelbase, inches: 112.0
Weight, lbs: 3,800
Number built: 8,773

Top Available Engine
Type: ohv V-8
Displacement, cid: 454
Fuel system: 1 x 4bbl.
Compression ratio:11.25:1
Horsepower @ rpm: 450 @ 5600
Torque @ rpm: 500 @ 3600

Representative Performance
0-60 mph, sec: 6.1
1/4 mile, sec. @ mph: 13.7 @ 103 1970

Sources : Muscle Cars, American Street Machines

Pics sources : Modell Paradies, How Stuff Works

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