Сhevrolet Сhevelle

1970 Chevelle

“Fresh, beautiful styling. From beginning to end.” 1970 Chevelle brochure
  • Sheet metal change produced a slightly more square body style for the 1970 Chevelle.
  • The 300 DeLuxe line was reduced to just two models: the sport coupe and the 4-door sedan.
  • Still without a dedicated series, the SS package was expanded into two divisions, one nearly identical to the 1969 model and one with an engine that produced the most horsepower in any Chevelle before or since.

Muscle Car Specifications

Performance Model
1970 Chevrolet Chevelle SS LS5
Engine Used
Zero to Sixty
6.0 sec
Quarter Mile
14.2 sec @ 100.0 mph

Not only did the 1970’s Chevelles usher in a new decade, they also saw the peak of muscle car performance. Other than name changes and some slight body style tweaks, the big news of the year for the Chevelle was the 454 cubic inch behemoth available in one of the two SS packages. The muscle car wars would never be the same again.

Though it didn’t occur until late 1970, after the 1971 Chevrolet models were out, in fact, a 65-day strike at General Motors resulted in sales losses for the 1970 calendar year, resulting in Ford overtaking Chevy as the sales leader. Chevelle numbers understandably took a loss and production came in at under 400,000 units for the first time since 1967, with 354,855 Chevelles produced.

300 DeLuxe

The base line 300 DeLuxe models were divided up into two distinctions: the 133 series if the car contained a six cylinder, or 134 if there was a V-8 under the hood. With a limited number of interior color choices (black, blue or dark green for cloth-and-vinyl interiors; black for all vinyl), this series still offered a very economical base price for the Chevelle, with the least expensive being the 4-door sedan, totaling $2,679. As with all Chevelle’s in 1970, the 300 DeLuxe models featured an improved full coil suspension.

An additional option known as the Heavy Chevy was released later in the production year. Based around the sport coupe and including a base 307 cubic inch V-8 and options up to the 402 cubic inch V-8, the Heavy Chevy basically served as a base Chevelle with more extensive interior and trim models than the other models in the Chevelle line.


The Malibu was also sub-divided dependent on the type of motor, with six cylinder models given the designation 135 and the V-8’s being referred to as 136. The Malibu diminished its model options in 1970 down to four: the sport coupe, convertible, sport sedan and 4-door sedan. Additionally, the standard V-8 for the Malibu was upped to the 307 cubic inch engine, producing 200 horsepower. Like previous years, the Malibu boasted a much wider variety of interior color and trim options than its 300 DeLuxe series counterpart.

Super Sport Packages

The most exciting news for the 1970’s Chevelle models, however, was the introduction of a new SS package. Instead of being available for any 2-door Chevelle model, the SS packages were now exclusive to the Malibu sports coupe and convertible, as well as the El Camino pickup.

Unlike the 1969 Chevelle, the 325 horsepower engine was dropped and the first SS package, known as RPO Z25 SS, was a 402 cubic inch engine that produced 350 horsepower. But the big news was the second package, known as the RPO Z15 SS.

General Motors dropped their 400 cubic inch limit in time for the 1970 models, and the RPO Z15 took full advantage of this with a 454 cubic inch engine that produced 360 horsepower, but when an optional engine known as the LS6 was installed, the horsepower jumped to 450. Both RPO Z15 packages included a new option, cowl induction. This consisted of a small trap door at the base of the hood dome that collected high pressure air from around the windshield and funneled it into the carburetor for added performance.

Muscle Car Competition

The RPO Z15 packages saw the definite pinnacle of the Chevelle as a muscle car. Rules and regulations would force the following year’s model to include only smaller engines, and the Chevelle would never regain its status as a car with more than ample power that still included a relatively low price tag.

In 1970, the base SS model was in direct competition with both the Pontiac GTO and the Ford Gran Torino, with the horsepower for all hovering around the 360 – 370 range. In fact, federal regulations and unleaded gas would soon see all of the muscles cars toning down the powerful engines in those 1970 models.

Very little was changed about the Chevelle in 1971, the biggest changes were to the front end of the car. The double headlights were replaced in favor of Power-Beam single-unit headlights borrowed from the Monte Carlo.

Engine Specifications

Type Size Carb Horse Power Tourqe
I6 250ci 1x1bbl 155 hp @ 4200 rpm 235 lb-ft @ 1600 rpm
V8 307ci 1x2bbl 200 hp @ 4600 rpm 300 lb-ft @ 2400 rpm
V8 350ci 1x4bbl 300 hp @ 4800 rpm 380 lb-ft @ 3200 rpm
V8 350ci 1x2bbl 250 hp @ 4800 rpm 345 lb-ft @ 2800 rpm
V8 402ci 1x4bbl 375 hp @ 5600 rpm 415 lb-ft @ 3600 rpm
V8 402ci 1x4bbl 375 hp @ 5600 rpm 415 lb-ft @ 3600 rpm
V8 402ci 1x4bbl 350 hp @ 5200 rpm 415 lb-ft @ 3400 rpm
V8 402ci 1x4bbl 330 hp @ 4800 rpm 410 lb-ft @ 3200 rpm
V8 454ci 1x4bbl 450 hp @ 5600 rpm 500 lb-ft @ 3600 rpm
V8 454ci 1x4bbl 360 hp @ 4400 rpm 500 lb-ft @ 3200 rpm

Performance Statistics

0 to 60 mph Quarter Mile Engine Source
n/a 13.3 sec @ 107.0 mph 454ci/450hp MCR Feb/Mar 1996
n/a 13.9 sec @ 100.3 mph 454ci/450hp MCR 12/95
n/a 13.6 sec @ 104.0 mph 450ci/450hp SSC
n/a 13.4 sec @ 108.2 mph 454ci/450hp Hot Rod
n/a 13.1 sec @ 107.0 mph 454ci/450hp Car Craft
5.5 sec 13.8 sec @ 98.5 mph 454ci/450hp MCR
6.0 sec 14.2 sec @ 100.0 mph 454ci/360hp MCR
8.1 sec 15.5 sec @ 90.0 mph 396ci/350hp Car Life
Overall rating
Parts Availability

Is This The Best Look Chevelle Ever Or What?

The 1969 Chevelle looks good and the 1967 Chevelle looks great but the 1970 Chevelle tops them all. A dark blue one with white racing stripes just sets my blood to boiling. Add a black vinyl roof, black interior with bucket seats and a fancy console and perfection is achieved. There were many great looking muscle cars but this has to be one of the top five. It just looks the part.

1 Comment

  • Nice site and great info, but I wish you’d find more factory looking original vehicles in factory condition rather than the bling wheeled cars you seem to prefer.

    Muscle cars look awful with those bling rims. Even if they didn’t they’re not factory. Why have a website about musclecar facts if you’re showing cars with aftermarket parts and non standard custom paint jobs on them.

    The ’68 Chevelle is ridiculous. The ’70 Chevelle with those JC Whitney-looking over-chromed wheels looks almost as bad. Certainly not representative of the best musclecar ever made.

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