1970 Corvette Pricing, Factory Options, & Colors

Base Corvette Convertible (19467)

• The base price of the 1970 Corvette Convertible without any optional equipment.
• A 350 cubic inch, 300 horsepower engine, 4-speed wide ratio manual transmission, vinyl interior trim, and a convertible top were included in the base price.
• The previously optional tinted glass and Positraction axle were also included in the base price.
• Body design for 1970 was updated with fender flares to reduce wheel-thrown debris damage, which had become a problem with 1968-1969 models.  Exhaust tips were rectangular, replacing the round style of earlier years.  Front grills were square mesh.
• Parking lamps, located at the grills outer edge, had clear lenses with amber bulbs.

Custom Interior Trim ( — )

• Optional interior trim upgrade that included a number of custom modifications to the base interior.
• The custom interior trim included leather seat trim, wood-grain accents and carpet trim on door panels, wood-grain accents on the console, and cut-pile carpeting.
• All interiors in 1970 were refined, including redesigned seats for additional headroom and easier access to rear storage.

Power Windows (A31)

• Factory installed power driver and passenger windows.
• This option was not available to consumers when the RPO ZR1  was ordered.

Custom Shoulder Belts (A85)

• An addition to the standard lap safety belt that crosses over the shoulder for added safety.
• The shoulder belts option were included with all Corvette coupes at no additional charge.  The option was also available on the Corvette convertible, but at an additional cost.

Auxiliary Hardtop (for convertibles) (C07)

• An optional hard-top that could be installed in lieu of the convertible top.

Vinyl Covering (for Auxiliary Hardtop) (C08)

• This option provided an external vinyl liner application to the auxiliary hardtop.
• The vinyl covering provided a faux convertible top appearance even when the hardtop was mounted on the car.

Rear Window Defroster (C50)

• Optional rear window defroster unit.
• This option was not available to consumers when the RPO ZR1  was ordered.

Air Conditioning (C60)

• Factory installed air-conditioning.
• System includes evaporator, blower, condenser, receiver-dehydrator, refrigerant (freon) tank, air intake assembly and duct assembly for both systems.
• Heater integrated, manually controlled by knobs on instrument control panel that operate bowden cables to activate various doors/ducts and switches to operate system.
• This option was not available to consumers when the RPO ZR1  was ordered.

Positraction Rear Axle Ratio (G81)

• The factory optioned rear axles available for the 1970 Corvette.

Power Brakes (J50)

• Vacuum power assisted brakes; includes dual circuit master cylinder.

350ci, 350hp Engine (L46)

• Alternate small-block engine with improved 350 horsepower output.

454ci, 390hp Engine (LS5)

• Alternate big-block engine rated at 390 horsepower and 500 lb/ft of torque.

350ci, 370hp Engine (LT1)

• Alternate high performance small-block 350 cubic inch engine.
• It used solid lifters, 11:1 compression, the ‘178’ high-performance camshaft, and a 780 CFM Holley four-barrel carburetor on a special aluminum intake, with rams’ horn exhaust manifolds, Delco transistor ignition and a low-restriction exhaust factory rated at 370 bhp.
• Redline was 6500 rpm but power fell off significantly past 6200 rpm.

4-Speed Manual Transmission, Close Ratio (M21)

• A close ratio version of the M20 Muncie 4-speed manual transmission.
• The gear ratios for the RPO M21 Close Ratio 4-Speed Manual Transmission are: 1st Gear – 2.20:1, 2nd Gear – 1.64:1, 3rd Gear – 1.28:1, 4th Gear – 1.0:1 (Direct).

4-Speed Manual Trans, Close Ratio, Heavy Duty (M22)

• A heavy-duty version of the Close Ratio Manual Transmission.
• This heavy duty transmission came equipped with a fine spline input shaft, a larger diameter output shaft and gear teeth that utilized reduced helix angles.  It was equipped with the following gear ratios: 1st Gear – 2.20:1, 2nd Gear – 1.64:1, 3rd Gear – 1.27:1, and 4th Gear – 1.00:1.

Turbo Hydra-Matic Automatic Transmission (M40)

• An optional, three-speed automatic transmission.
• The Turbo Hydra-Matic Automatic Transmission consisted of a 3-element hydraulic torque converter and compound planetary gear set.  It was equipped with the following gear ratios: 1st Gear – 2.48:1, 2nd Gear – 1.48:1, and 3rd Gear – 1.00:1.
• The M40 Turbo Hydra-Matic transmission cost $221.80 when combined with the standard 350 cubic inch, 300 horsepower engine, but cost $290.40 when combined with RPO’s L71, L88 or L89.

California Emissions (NA9)

• Emissions system designed to meet the more stringent demands of California’s EPA requirements.
• Only approximately 80 1970 Corvettes were equipped with the California emissions option.

Tilt Telescopic Steering Column (N37)

• An optional, adjustable steering column and tilt-angle adjustable steering wheel.
• The Telescopic Steering Column changes the drivers distance from the steering wheel by literally telescoping the steering wheel closer to or further away from the vehicle operator.

Power Steering (N40)

• Hydraulically assisted power steering.
• This option was not available to consumers when the RPO ZR1  was ordered.

Deluxe Wheel Covers (P02)

• Optional deluxe wheel covers.
• This option was not available to consumers when the RPO ZR1  was ordered.

White Stripe Tires, F70 x 15, nylon (PT7)

• Standard size tires with a special 3/8″  wide white sidewall stripes.

White Letter Tires, F70x 15, nylon (PU9)

• Standard size tires with a special 3/8″  wide white sidewall letters.

Heavy Duty Battery (T60)

• The heavy duty battery provided additional cranking amps to aid in turning the larger LS5 engine.
• While available as an option on any 1970 Corvette, the Heavy Duty Battery came standard with the LS5 equipped Corvettes.

Alarm System (UA6)

• A factory installed alarm system.
• When activated, the alarm system would trigger the horn to sound in a repetitive pattern of short bursts.
• This option was not available to consumers when the RPO ZR1  was ordered.

AM-FM Radio (U69)

• A standard/stock dealer installed Corvette radio for model years 1968-1971.
• The radio broadcast only a mono signal.
• This option was not available to consumers when the RPO ZR1  was ordered.

AM-FM Radio, Stereo (U79)

• An optional dealer installed Corvette radio for model years 1968-1971.
• This radio option provided a true stereo signal.
• This radio featured green lettering.
• This option was not available to consumers when the RPO ZR1  was ordered.

Special Purpose Engine Package (ZR1)

• Optional performance and handling upgrade.
• The ZR1 option included the LT1 engine, M22 transmission, heavy-duty power brakes, transistor ignition, special aluminum radiator, and special springs, shocks, and front & rear stabilizer bars.
• When the ZR1 option was ordered, the following options were not available on the 1970 Corvette: Power Windows (A31), Rear
• Window Defroster (C50), Air Conditioning (C60), Power Steering (N40), Deluxe Wheel Covers (P02), Alarm System (UA6), AM
• FM Radio (U69), AM-FM Radio, stereo (U79).
• ZR1’s came equipped with metal fan shrouds.

Notes

• An LS7 engine rated at 460 horsepower (or 465 horsepower) was planned to be included as an option, and GM went as far as to list it in the vehicle order guides.  The LS7 was to be a big-block version of the LT1, including aluminum heads.  A ZR2 package with the LS7 was also planned.  The suffix for the LS7 was assigned as CZL for manual, CZN for automatic.  The LS7 and ZR2 were canceled and it is believed that none were delivered to retail customers.
• Big block engine displacement increased from 427 cubic inches to 454 cubic inches.  The small block engine displacement remained the same at 350 cubic inches, although the new LT1 engine option included solid lifters and was rated at 370 horsepower.
• The 1970 model year included the lowest production numbers of any Corvette since 1962, due in part to an extended production run of the 1969 model year.