1970 Pontiac Mid-Size Car Facts, Figures, and Specifications
Five Fast Facts You May Not Know
1970 Pontiac GTO Judge
1970 Pontiac GTO Convertible
1970 Pontiac LeMans Hardtop
1. 455 CID HO V-8 New GTO Engine Option
2. New "Endura" Front Fascia For GTO
3. Rear Heavy Duty Suspension Gets Sway Bar
4. GT-37 Becomes Entry Level Performance Package
5. OHC I-6 and Sprint Package are Gone
Check out this companion article by Martyn Schorr: 1970 PONTIAC GTO – MUSCLECAR MAGIC FROM MOTOWN! – Car Guy Chronicles
1970 – Subtle Changes Improve the Looks
Hidden headlights were deleted in favor of four exposed round headlamps outboard of narrower grille openings. The nose still had a protruding vertical prow theme, although it was less prominent. While the standard Tempest and LeMans had chrome grilles, the GTO retained the Endura urethane cover around the headlamps and grille. The Judge package remained available as an option on the GTO. Again, the Judge came standard with the “Ram Air 400” V-8 while the Ram Air IV was optional.
1970 Pontiac Mid-Size Car Resources
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1970 Pontiac GTO Judge Poster
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The PONTIAC
GTO/GT-37 GUIDE
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Every single fact and part number!
Covers 1964-1974 & 2004 GTO and 1970-1971 GT-37. 126 pages • Downloadable PDF
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1970 Pontiac Mid-Size Cars Facts – Body Paint Color Codes
Click on the Paint Code Name to See the Mix Codes for the appropriate color:
1970 Pontiac Mid Size
| 14 Palladium Silver | |
| 19 Starlight Black | |
| 25 Bermuda Blue | |
| 28 Atoll Blue | |
| 34 Mint Turquoise | |
| 45 Palisade Green | |
| 47 Verdoro Green | |
| 48 Pepper Green | |
| 50 Sierra Yellow | |
| 55 Baja Gold | |
| 58 Granada Gold | |
| 60 Orbit Orange | |
| 63 Palomino Copper | |
| 75 Cardinal Red | |
| 78 Burgundy |
Collector Car Insurers
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1970 Pontiac Mid-Size Car Facts and Specifications
General Year Information – 1970 Pontiac Mid-Size Cars
Styling Changes
The entire mid-size model line received another facelift for the 1970 model year with hidden headlights deleted in favor of exposed round headlamps outboard of a set of narrower grille openings. The nose retained the protruding vertical prow theme. While the standard Tempest and LeMans had chrome grilles, the GTO retained the Endura urethane cover around the headlamps and grille.
Model Names Revamped
LeMans, as a nameplate was now used on the mid-priced Tempests, formerly called “Custom S” models. The top level Tempest line was now called “LeMans Sport”. The GTO utilized Tempest sheetmetal combined once again, with the Endura front fascia. Initially, the line was down to just two- and four-door sedans but expanded at mid-year with the introduction of the low-priced T-37 hardtop coupe.
Suspension Upgrades
The GTO suspension was upgraded with the addition of a rear anti-roll bar, essentially the same bar as developed by Oldsmobile for the 442 in 1964 and later added to the Buick Gran Sport. The front anti-roll bar was slightly stiffer.
OHC I-6 Gone
Significant was the end of production of the OHC I-6 engine. It was replaced with the Chevrolet pushrod version of the engine in the same displacement and delivering 155 HP only.
1970 Pontiac Mid-Size Cars Factoids
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A new option was the 455 HO, a long-stroke engine rated by Pontiac at 360 HP. The camshaft used in the Ram Air 400 and the GTO 455 HO were the same. Bore and stroke: 4.1251″ x 4.210″. Compression ratio: 10.75:1. Horsepower: 360 @ 4600 RPM. Torque: 500 @ 3100 RPM. Its advantage was torque – 500 vs. 445. See a comparison of GTOs – 455 vs 400 HERE.
The GTO suspension was upgraded with the addition of a rear anti-roll bar, essentially the same bar as developed by Oldsmobile for the 442 in 1964 and later added to the Buick Gran Sport. The front anti-roll bar was slightly stiffer.
1970 Pontiac Mid-Size Cars Facts – Models Offered
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Tempest – Series 233 – Tempests were given new Firebird-like bumper grilles, wraparound front parking and taillights, crease sculptured side styling and body color nose panels. Standard equipment included front door arm rests, panel, ash tray and cigar lighter lamps, 37-amp Delcotron alternator, dome lamps, automatic interior lamp switches, in-the-windshield hidden antennas, wraparound side reflex markers, a choice of cloth and Morrokide combination interiors, fiberglass belted blackwall tires and side guard door beams. “Tempest” lettering was set behind front wheel openings. In February 1970 the lower-price Tempest T-37 hardtop coupe was introduced. The following fall, a pair of economy type high-performance cars were introduced, called the GT-37 coupe and GT-37 hardtop coupe.
Models were 2-door Sport Coupe, 2-door Hardtop Coupe, 4-d00r Sedan, T-37 2-door hardtop Coupe-6P, GT-37 2-door Hardtop Coupe and GT-37 2-door Sport Coupe.
LeMans – Series 235 – LeMans was now used on the mid-priced Tempests – formerly called “Tempest Custom”. Added standard features included loop pile carpets, Morrokide seats and door sides, a day/night rear view mirror, and rear arm rests with ash trays. Styling upgrades included body decor moldings, “LeMans” on the rear fenders, four short horizontal chrome slashes behind front wheel openings, and “LeMans” in block letters on the right-hand edge of the deck lid.
LeMans models were 2-door Sport Coupe, 2-door Hardtop Coupe, 4-door Sedan, 4-door Hardtop Sedan, and 6-passenger Station Wagon.
LeMans Sport – Series 237 – The ‘high-end of the Tempest line was now called “LeMans Sport”. Identifiers a “Sport” in script below the rear fender “LeMans” model lettering. Standard equipment included all LeMans features plus glove compartment and ash tray lamps, front foam cushions, knit and expanded Morrokide trim and padded wood-grained dashboards. Four-door hardtops had notch back seats; hardtop coupes had bucket seats and convertibles came with the choice of either type of seat. The LeMans Station wagons were available as a Safari with exterior wood trim or as a standard-sided model and were now directly part of the LeMans line without a separate series designation.
LeMans Sport Models were 2-door Sport Coupe, 2-door Hardtop Coupe, 4-door Hardtop Sedan, Convertible, and 6-passenger Station Wagon.
GTO – Series 242 – The GTO models used Tempest sheetmetal but had the Endura rubber nose. Twin oval cavities housed recessed grilles with GTO letters on the left-hand side. There was also “GTO” in lettering behind the front wheel openings and flared, crease-sculptured fenders.
Standard equipment included bucket seats, vinyl trimmed padded dashboard, twin air scoops with handles, heavy duty clutch, sports type springs and shock absorbers, carpeting, glove box, ash tray· and panel courtesy lamps, dual exhausts, Deluxe steering wheel, three-speed manual floor shift and G78 x 14 blackwall fiberglass tires.
The Code 332-WTl “The Judge” option was again available at $337 extra over base model price. It included the 400 CID RAM AIR V-8; Rally II wheels without trim rings; G70 x 14 fiberglass blackwall tires; rear deck air foil; side stripes; Judge stripes and decals; black textured grilles and T-handle shifters on cars with manual gear boxes.
GTO models were 2-door Hardtop Coupe and Convertible, and GTO Judge 2-door Hardtop Coupe and Convertible.
1970 Pontiac Mid-Size Cars Facts – Engines
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- 155 HP 250 CID I-6
- 255 HP 350 CID V-8
- 265 HP 400 CID V-8
- 330 HP 400 CID V-8 AMT
- 350 HP 400 CID V-8
- 360 HP 455 CID V-8 AMT
- 360 HP 455 CID V-8 SMT
- 360 HP 455 CID Ram Air V-8 AMT
- 360 HP 455 CID Ram Air V-8 SMT
- 366 HP 400 CID V-8 Ram Air
- 370 HP 400 CID Ram Air IV V-8
250 CID I-6 – All Transmissions. Overhead valves. Cast iron block. Seven main bearings.
Displacement: 250 cubic inches.
Bore and stroke: 3.875 x 3.525 inches.
Compression ratio: 8.5:1.
Horsepower: 155 @ 4200 RPM.
Torque: 235 @ 1600 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 244°, Exhaust 244°, Overlap 33.5°, Lift 0.388″.
Carburetor: Rochester one-barrel model (manual transmission) 7040017 (automatic transmission) 7040014.
NOTE: Standard Tempest, LeMans and LeMans Sport.
350 CID 2-Barrel V-8 – All Transmissions. Cast Iron Block. Five main bearings.
Displacement: 350 CID.
Bore and stroke: 3.750″ x 3.75″
Compression ratio: 8.8:1.
Horsepower: 255 @ 4600 RPM.
Torque: 355 @ 2800 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 269°, Exhaust 277°, Overlap 47°, Lift (intake) 0.376″; (exhaust) 0.412″.
Carburetor: Rochester 2-barrel (manual transmission) 7040071 (automatic) 7040062.
NOTE: Tempest, LeMans and LeMans Sport only.
400 CID 2-Barrel Economy V-8 – All Transmissions: Overhead valves. Cast iron block. Five main bearings.
Displacement: 400 CID.
Bore and stroke: 4.120″ x 3.750″.
Compression ratio: 8.8:1.
Horsepower: 265 @ 4600 RPM.
Torque: 397 @ 2400 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 269°, Exhaust 277°, Overlap 47°, Lift (intake) 0.376″; (exhaust) 0.412″.
Carburetor: Rochester two-barrel Model 7040060.
NOTE: Tempest, LeMans and LeMans Sport only.
400 CID 4-Barrel V-8 – Automatic Transmission Only. Overhead valves. Cast iron block. Five main bearings.
Displacement: 400 CID.
Bore and stroke: 4.120″ x 3.750″.
Compression ratio: 10.0:1.
Horsepower: 330 @ 4800 RPM.
Torque: 445 @ 2900 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 273°, Exhaust 282°, Overlap 55°, Lift (intake) 0.410″; (exhaust) 0.414″.
Carburetor: Rochester four-barrel Model 7040264.
NOTE: Tempest, LeMans and LeMans Sport only.
400 CID 4-Barrel V-8 – All Transmissions. Overhead valves. Cast iron block. Five main bearings.
Displacement: 400 CID.
Bore and stroke: 4.120″ x 3.750″.
Compression ratio: 10.75:1.
Horsepower: 350 @ 5000 RPM.
Torque: 445 @ 3000 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 273°, Exhaust 289°, Overlap 54°, Lift (intake) 0.410″; (exhaust) 0.413″.
Carburetor: Rochester four-barrel (manual transmission) 7040263; (automatic transmission) 7040264.
NOTE: GTO models only.
455 CID 4-Barrel V-8 – Automatic Transmission Only. Overhead valves. Cast iron block. Five main bearings.
Displacement: 455 CID.
Bore and stroke: 4.1251″ x 4.210″.
Compression ratio: 10.75:1.
Horsepower: 360 @ 4600 RPM.
Torque: 500 @ 3100 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 273°, Exhaust 289°, Overlap 54°, Lift (intake) 0.410″; (exhaust) 0.413″.
Carburetor: Rochester four-barrel 7040268.
NOTE: GTO models only.
455 CID 4-Barrel V-8 – Manual Transmission Only. Overhead valves. Cast iron block. Five main bearings.
Displacement: 455 CID.
Bore and stroke: 4.1251″ x 4.210″..
Compression ratio: 10.75:1.
Horsepower: 360 @ 4600 RPM.
Torque: 500 @ 3100 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 288°, Exhaust 302°, Overlap 63°, Lift (intake) 0.414″; (exhaust) 0.413″.
Carburetor: Rochester four-barrel 7040267.
NOTE: GTO models only.
455 CID 4-Barrel V-8 Ram Air – Automatic Transmission Only. Overhead valves. Cast iron block. Five main bearings.
Displacement: 455 CID.
Bore and stroke: 4.1251″ x 4.210″.
Compression ratio: 10.75:1.
Horsepower: 360 @ 4600 RPM.
Torque: 500 @ 3100 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 273°, Exhaust 289°, Overlap 54°, Lift (intake) 0.410″; (exhaust) 0.413″.
Carburetor: Rochester four-barrel 7040270.
NOTE: GTO models only.
455 CID 4-Barrel V-8 Ram Air – Manual Transmission Only. Overhead valves. Cast iron block. Five main bearings.
Displacement: 455 CID.
Bore and stroke: 4.1251″ x 4.210″.
Compression ratio: 10.75:1.
Horsepower: 360 @ 4600 RPM.
Torque: 500 @ 3100 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 288°, Exhaust 302°, Overlap 63°, Lift (intake) 0.414″; (exhaust) 0.413″.
Carburetor: Rochester four-barrel 7040273.
NOTE: GTO models only.
400 CID 4-Barrel Ram Air V-8 – All Transmissions. Overhead valves. Cast iron block. Five main bearings.
Displacement: 400 CID.
Bore and stroke: 4.120″ x 3.750″.
Compression ratio: 10.75:1.
Horsepower: 366 @ 5100 RPM.
Torque: 445 @ 3600 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 288°, Exhaust 302°, Overlap 63°, Lift (intake) 0.414″; (exhaust) 0.413″.
Carburetor: Rochester four-barrel (manual transmission) 7040273; (automatic transmission) 7040270.
NOTE: GTO models only.
400 CID 4-Barrel Ram Air IV V-8 – All Transmissions. Overhead valves. Cast iron block. Five main bearings.
Displacement: 400 CID.
Bore and stroke: 4.120″ x 3.750″.
Compression ratio: 10.75:1.
Horsepower: 370 @ 5500 RPM.
Torque: 445 @ 3900 RPM.
Valve lifters: Hydraulic.
Camshaft duration: Intake 308°, Exhaust 320°, Overlap 87°, Lift (intake) 0.520″; (exhaust) 0.50″.
Carburetor: Rochester four-barrel (manual transmission) 7029273; (automatic) 7029270.
NOTE: GTO models only.
1970 Pontiac Mid-Size Cars Facts – Chassis Features
-
- Wheelbase: All 2-door: 112.0 inches; All 4-door & wagons: 116.0 inches..
- Overall length: (Station wagons) 210.6 inches; (4-door passenger cars) 206.5 inches; (Tempest/LeMans 2-door) 202.5 inches. (GTO) 202.9 inches.
- Overall width: 76.7 inches.
- Overall height: (Station wagons) 54.5 inches; (4-door passenger cars) 52.6 inches; (Tempest/LeMans 2-door) 52.0 inches. (Tempest/LeMans Convertible) 52.3 inches; (GTO Convertible) 52.3 inches; (GTO 2-door) 52.6 inches.
- Front track: All: 61 inches.
- Rear track: All Tempests: 60 inches.
- Standard tires: LeMans – I-6: F78 x 14 mounted on 14 x 6JJ rim wheels V-8: G78 x 14 mounted on 14 x 6JJ Wagons H78 x 14 mounted on 14 x 6JJ GTO – G70 x 14 x 6 JJ
- Optional tires: LeMans – G78 x 14
1970 Pontiac Mid-Size Cars Facts – Powertrain Information
- Three Speed Manual Transmission Ratios
- I-6: 1st – 2.85:1, 2nd – 1.68:1, 3rd – 1:1, Reverse – 2.95:1.
- 350 CID V-8: 1st – 2.54:1, 2nd – 1.50:1, 3rd – 1:1, Reverse – 2.63:1.
- 400 CID V-8 (Optional on 350 CID V-8): 1st – 2.42:1, 2nd – 1.61:1, 3rd – 1:1, Reverse – 2.33:1.
- Four Speed Manual Transmission Ratios
- V-8 Wide Ratio: 1st – 2.52:1, 2nd – 1.88:1, 3rd – 1.46:1, 4th 1:1, Reverse – 2.59:1.
- V-8 Close Ratio: 1st – 2.20:1, 2nd – 1.64:1, 3rd – 1.28:1, 4th 1:1, Reverse – 2.27:1.
- Automatic Transmission Ratios
- Tempest I-6 & 350 CID 2-bbl: Low – 1.76:1, High – 1:1, Reverse – 1.76:1.
- Optional T-350 Tempest I-6 & 350 CID 2-bbl: 1st – 2.52:1, 2nd – 1.52:1, 3rd – 1:1, Reverse – 1.92:1
- T-400 Standard GTO – Optional 350 CID: 1st – 2.48:1, 2nd – 1.48:1, 3rd – 1:1, Reverse – 2.08:1.
- Rear Gear Standard Ratios
NOTE: For more powertrain information, access the 1970 Pontiac Mid-Size AMA Specifications Sheets HERE.
1970 Pontiac Mid-Size Cars Facts – Powertrain Options
- Tempest
-
- Three-speed manual transmission standard.
- Two-speed automatic on cars with six-cylinder ($164-174).
- Turbo-Hydramatic 350 on V-8s ($227).
- Turbo-Hydramatic 400 ($227 on Tempests with 400 CID V-8).
- Three-speed manual transmission with heavy-duty floor shift ($84).
- Four-speed wide ratio manual transmission ($185).
- 155 HP I-6 engine standard.
- 255 horsepower regular fuel 350 cubic inch V-8 ($111).
- 265 horsepower regular fuel two-barrel 400 cubic inch V-8 with 8.8:1 compression ($53-163) Price depending upon model and transmission.
- 330 horsepower 400 cubic inch four-barrel V-8 with 10.0:1 compression ($210).
- Dual exhausts – where optional ($31).
- Sale-T-Track differential was ($42-63).
- GTO
-
- Turbo-Hydramatic 400 ($227).
- Wide or close ratio four-speed manual transmission ($185).
- 265 HP Regular Fuel Engine option, no charge.
- 350 HP 400 CID V-8 standard & exclusive to GTO.
- 366 horsepower H.O. V-8 standard on “The Judge”. Vehicles without “The Judge” option ($169).
- 370 horsepower RAM AIR IV engine. With “The Judge” option ($390 ). All other GTO models ($558).
- 360 horsepower 455 CID V-8 was added mid-year as a GTO option.
- Dual exhausts were standard.
1970 Pontiac Mid-Size Cars Facts – Accessories
-
- Adjustable front and rear shocks ($42).
- Air-conditioning ($376).
- Arctic wiper blades ($6).
- Automatic level control ($79.
- Auxiliary panel gauges $21-79).
- Base Tempest recessed wipers ($19).
- Carpets ($19).
- Console ($56).
- Cordova top ($100-142).
- Cruise control ($63).
- Custom Sport steering wheel ($34-50).
- Driver-controlled GTO exhausts ($63).
- Dual horns ($4).
- Front disc brakes ($63).
- Full floor carpeting ($53).
- Gage cluster, Rally with tachometer ($84).
- Gage cluster, Rally($51).
- GTO Judge package ($337).
- GTO type exhaust extensions ($21).
- Heavy-duty aluminum front brake drums ($72).
- Instant air heater ($16).
- Left-hand remote control outside mirror ($11).
- Luggage carrier for station wagons ($63-84).
- Passenger-side reclining bucket seat ($84).
- Power brakes ($42-64).
- Power disc front brakes ($64-74).
- Power door locks ($45· 68).
- Power rear antenna ($32).
- Power seat, four-way, driver side ($70).
- Power steering ($69).
- Radio, AM/FM ($134).
- Radio, AM/FM Stereo ($239)
- Rally I wheels ($40-61).
- Rally II wheel rims for passenger cars and Tempest station wagons ($63-84).
- Rally stripes on GTO ($11).
- Rear window defroster ($53).
- Recessed wipers on base Tempest ($19).
- Remote control deck lid ($15).
- Safeguard speedometer ($16).
- Station wagon luggage carrier ($63).
- Station wagon rear window deflector ($26).
- Super lift shocks for Tempest/GTO ($42).
- Tilt wheel with power steering ($45).
- Tinted windows ($35).
- Tinted windshield ($26).
- Wheel-house moldings ($16).
- Wire wheel discs ($53-74).
1970 Pontiac Mid-Size Car Downloads and Images
1970 Pontiac Mid-Size Cars Facts – Related Document Downloads
Files directly related to the Pontiac Mid-Size Line will appear below. Click to Download:
1970 Pontiac Performance Brochure
1970 Pontiac Tempest Print Ads
1970 Pontiac Mid-Size AMA Specifications Sheets
1970 Pontiac GTO 455 CID Road Test – Mechanics Illustrated Magazine
1970 Pontiac GTO 455 Road Test – Car & Driver Magazine
1970 Pontiac GTO 455 Road Test – Canada Track and Traffic Magazine
1970 Pontiac GTO 455 vs Ram Air 400 Road Test – Car Life Magazine
1970 Pontiac GTO Intro & Road Test – Motor Trend Magazine
1970 Pontiac GTO Ram Air IV Road Test – Motor Trend Magazine
1970 Pontiac GTO Ram Air IV Road Test – Popular Hot Rodding Magazine
1970 Pontiac Mid-Size Cars Facts – Related Images
Related Images to the 1970 Pontiac Mid-Size Line will appear below
1970 Pontiac GTO Convertible
The 1970 Pontiac GTO Convertible was still popular with 3,615 produced. By contrast, only 168 Judge convertibles were bought – making them extremely rare.
1970 Pontiac GTO Hardtop
The 1970 Pontiac GTO Hardtop was the stalwart of the GTO line, still popular, 32,737 were snapped up.
1970 Pontiac GTO Judge Hardtop
The 1970 Pontiac GTO Judge Hardtop was a bit more upscale than the standard GTO, with certain items like the Ram Air powerplant standard. Apparently this did not entice many as only 3,629 were sold.
1970 Pontiac LeMans Sport Convertible
The 1970 Pontiac LeMans Sport Convertible was priced just under its GTO brother and was popular enough to have 4,670 delivered in the year.
1970 Pontiac LeMans Sport Hardtop
The 1970 Pontiac LeMans Sport Hardtop was a popular choice in 1970.58,356 were delivered.
1970 Pontiac LeMans Sport 4-door Hardtop
The 1970 Pontiac LeMans Sport 4-door Hardtop was the top of the line mid-size 4-door. 3,657 were made.
1970 Pontiac LeMans Sport Coupe
The 1970 Pontiac LeMans Sport Coupe should have been the poor man’s GTO when equipped with the 400 CID 330 HP V-8. Not too many thought to do that with a total of only 1,673 built.
1970 Pontiac LeMans Safari
The 1970 Pontiac LeMans Safari was the top line mid-size wagon in 1970. 3,872 were sold. Mid-size wagons were priced too close to their Catalina brethren, with most people choosing the larger size version.
1970 Pontiac LeMans Wagon
The 1970 Pontiac LeMans Wagon was the least expensive wagon offering in Pontiac in 1970. 7,165 were produced.
1970 Pontiac LeMans Hardtop
The 1970 Pontiac LeMans 2-door Hardtop was quite popular with 52,304 produced.
1970 Pontiac LeMans 4-door Hardtop
The1970 Pontiac LeMans 4-door Hardtop was a bit more upscale than the sedan, but buyers weren’t enticed. Only 3,872 were delivered.
1970 Pontiac LeMans 4-door Sedan
The 1970 Pontiac LeMans 4-door Sedan sold well. 15,255 were sold.
1970 Pontiac LeMans Coupe
The 1970 Pontiac LeMans Coupe did not sell well with only 5,656 built.
1970 Pontiac Tempest Hardtop
The 1970 Pontiac Tempest Hardtop was the least expensive hardtop offering in the Tempest line. It would later be joined by an even less pricey T-37, then later by a GT-37 hardtop. Total Tempest hardtop production for 1970 was 20,883.
1970 Pontiac Tempest Coupe
The 1970 Pontiac Tempest Coupe was the least expensive Pontiac one could buy in 1970. It was later joined by a low priced sport version called the GT-37 Coupe. Total Tempest Coup production was 17,181.
1970 Pontiac Tempest 4-door Sedan
The 1970 Pontiac Tempest 4-door Sedan was the low price leader for mid-size Pontiac sedans. 9,741 were built.