1970 Oldsmobile Cutlass Supreme Convertible

Description

Following up on somewhat quirky 1968 styling, Oldsmobile Cutlass designers developed a frontal appearance for 1969 that would, with annual variation, mark the popular Cutlass through 1972. Revamped body panels and new rooflines followed in 1970. 

The 1970 model’s front-end styling included a split grille with vertical bars and quad headlights. Lower body trim started at the front side markers, ran over the wheel wells, and flowed to the rear side markers just in front of the rear bumper. 

Oldsmobile advertising referred to the ’70 Cutlass Supreme as "an Escape Machine” and waxed eloquently about the economical luxury that it provided its buyers. “Imagine you cruising around town in this sleek beauty. Proud? You'd better believe it. This trim, new personal-size Supreme lets you move up to Olds elegance without leaving the low-price field ... Oldsmobile: Escape from the ordinary." 

Most 1968-72 Cutlass buyers chose the standard 350 cubic-inch V8 engine, and these cars are typically excellent performers that demonstrate the qualities and engineering that would drive Oldsmobile to third place in the industry by 1972. Sharing many parts with highly collectible 4-4-2 models, second-generation Cutlasses are well served by reproduction parts vendors and an exceptional enthusiast community. 

Highlights 

• 350-cu-in Rocket V8 producing 250 horsepower and 355 lb-ft of torque 

• Four-speed automatic transmission 

• Blue paint over blue interior 

• The chassis number (342670M366208) decodes as:

  •  3 – Oldsmobile 

  • 42 – Cutlass Supreme 

  • 67 – Two-door convertible 

  • 0 – 1970 

  • M – Assembly plant: Lansing, Michigan 

  • Last six digits – Production Number 366208 

• The body plate decodes as: 

  • 70-34267 – 1970 Cutlass Supreme convertible 

  • LAN465616 – Lansing, Michigan assembly plant; build sequence 

  • TR993 – Dark blue interior 

  • 20 – Azure Blue 

  • C – Blue convertible top 

  • 05D – Built during the fourth week of May

• Dual exhaust with Xlerator muffler 

• Crager 14 inch wheels shod with Mastercraft Avenger G/T P225/70R14 tires 

• Power steering 

• Functional power soft top with boot cover 

• Factory air conditioning converted to R-134A refrigerant  

• One of 4,867 Cutlass Supreme Convertibles in 1970 

• Offered with 73,133 miles, however the true mileage is unknown 

Features 

• Two-door convertible 

• Double-padded, cloth bench seats 

• Lap belts: three in front, three in back 

• Woodgrain accents 

• Manual-crank windows 

• Manual seats 

• Dual-side rearview mirrors 

• Aftermarket AM/FM radio 

• Brakes: Power-assisted front discs and rear drums 

• 0-60 mph in 8.2 seconds 

• Length: 203.2 inches 

• Width: 76.2 inches 

• Wheelbase: 112 inches 

• Curb weight: 3,613 pounds 

Known Imperfections 

• Passenger side: Rear tire is missing some sidewall rubber; scratch on mirror housing and scratches on front and rear fenders; bubbled paint between trunk and convertible top; small dent on rear fender just behind the wheel well 

• Driver’s side: Touch-up paint and large scratches on rear fender near bumper; door trim is supported with a screw; small chip above pinstriping on door 

• Chipped paint on both lower rear fenders 

• Boot cover has a stain 

• Air conditioning works but leaks 134A (needs 1-2 cans per season) 

Included 

• Original sport wheels 

• Spare tire 

• Aftermarket rubber floor mats 

Ownership History 

The owner of this 1970 Oldsmobile Cutlass Supreme Convertible purchased it in 2016 from a neighbor, who bought it 10 years earlier in Madison, Wisconsin. The convertible top was previously white but was switched to black 12 years ago.