1970 Chevrolet Chevelle SS 454 LS6

Description

While the Chevrolet Chevelle debuted in 1964 with an angular design, the second-generation 1968 model bowed with a more rounded, aggressive look, the hardtop’s semi-fastback roofline drawing inspiration from the recently redesigned Camaro. By 1970, the Chevelle’s design evolved further with distinctive sheetmetal, as well as an upgraded interior offering more modern conveniences.

The big news was the SS 454 package, which featured unique styling, a domed hood, and special wheels to go along with a sport suspension, power disc brakes, and of course, a 454-cubic inch V8. However, there was a late addition to the 1970 Chevelle SS lineup with even higher performance: the LS6 454. Rated at an astounding 450 horsepower, the LS6 is known as one of the most powerful muscle car engines ever built. A 1970 Hot Rod track test recorded an incredible 13.44 quarter-mile time, with the writer stating, “Low-end torque was so tremendous that there was no way the car would leave smoothly. Torque isn’t a passing phase in this 454.”

This 1970 Chevelle SS 454 is believed to have retained its original LS6 engine, making it one of only 4,475 LS6-powered GM vehicles built in 1970 — and one of the most desirable muscle cars of all time.

Highlights 

• The undisputed king of Chevrolet muscle cars 

• LS6 454 cu-in V8 rated at 450 hp and 500 lb-ft of torque  

• Cylinder block pad shows “T070 CRR 221899” stamping 

• (M40) Three-speed automatic transmission, wearing an ID tag showing “70-CY-2214” 

• Finished in (28) Fathom Blue Metallic with (756) Black vinyl interior 

• Positraction 3.31 axle ratio with stamping showing “CRV” 

• 14-inch wheels wearing 225/70R14 Cooper Cobra tires 

• The chassis number (136370K221899) decodes as:   

  • 1 – Chevrolet    

  • 36 – Malibu and Concours, eight-cylinder    

  • 37 – Two-door sport coupe    

  • 0 – Model year 1970    

  • K – Kansas City, MO final assembly plant    

  • 221899 – Plant serial number starting with 100001 

• The Body by Fisher tag decodes as:  

  • Style: 70-13637 – 1970 Malibu (Sport Coupe)  

  • Plant: KAN – Kansas City, Missouri, final assembly plant    

  • Body: 201469 – Production sequence number  

  • Trim: 756 – Black coated fabric interior  

  • Paint: 28 28 – Fathom Blue 

  • 07C – Third week of July production date  

 Features 

• LS6 454 engine includes: 

  • 4.25-inch bore and 4.00-inch stroke 

  • Forged steel crankshaft 

  • Forged connecting rods 

  • Solid camshaft, 316º/302º advertised duration, .520-inch lift, .024/.028-inch lash 

  • Solid lifters 

  • Rectangle port heads with 2.19-inch intake and 1.88-inch exhaust valves 

  • 1.7-ratio rocker arms 

  • Holley four-barrel carburetor 

  • 11.25 to 1 compression ratio 

• Additional factory options include: 

  • (Z15) SS 454 package 

  • (ZL2) Cowl Induction hood 

  • (F41) Special performance suspension 

  • (G80) positraction axle 

  • (GY2) 3.31 axle ratio with stamping showing “CRV” 

  • (J50) Vacuum power brakes 

  • (JL2) Power disc brakes 

  • (N40) Power steering 

  • (U14) LS6-specific cluster with round gauges and 6,500-rpm redline tachometer 

  • (U35) Electric clock 

  • (U27) Glove box light 

  • (U63) AM radio 

  • (U76) Windshield antenna 

  • (C24) Recess park wiper 

  • (C56) Upper level vent 

  • (A51) Strato bucket seats 

  • (D55) Console 

  • (PL4) F70x14 blackwall tires 

  • (ZK8) Tire pressure label 

  • (T60) Heavy duty battery 

  • (D88) Hood and decklid stripe 

  • (B80) Roof drip molding 

  • (B93) Door edge guards 

  • (B96) Wheelhouse moldings 

Known Imperfections 

• Has an older repaint with light scratches and swirl marks  

• Crack in steering wheel 

• Bumpers show very slight pitting 

• Minor scratches around hood pins 

• Light corrosion on chrome valve covers 

• Light corrosion in trunk, may need new trunk gasket 

 Included  

• Keys 

• Build sheet 

• Service records 

 Ownership History  

The consignor states, “This Fathom Blue Metallic 1970 Chevelle LS6 is believed to retain its original drivetrain, and comes with a build sheet showing the options. This could be the last Kansas City built automatic LS6, as the sequence number of the VIN is less than 400 from the end of production which includes all Chevelle, Malibu, and El Camino vehicles, putting the car as being built on either the second to last or the very last day of 1970 Kansas City plant production.”