Makes › Buick › GS and GSX › GS 455 Convertible (1970) · Rare specification · 1970 Rare
Buick
GS 455 Convertible (1970)
GS 455 in convertible form (model 44667)
Still being researched: full specifications. Everything shown is checked against the cited sources. Know more? Send us a source.
Photo: Mopar89 · CC BY-SA 3.0
Contents
01Overview
At a glance
- Built
- 1,416 Built
- Years
- 1970
- Engine
- 7,460 cc / 7.5 LFactory: 455 cu in · converted
- Power
- 261 kW / 355 PSFactory: 350 hp · converted
- Top speed
- Not yet verified
- Body
- Not yet verified
- Designer
- Not yet verified
- In this archive
- Not yet verified
- Surviving
- Not yet verified
Sources and any conflicting figures are in the sections below.
Why it matters
The 1970 GS 455 put Buick's new 455 cu in V8 into the Skylark-based Gran Sport body, and the convertible was the most expensive way to buy it. It was the model year in which Buick dropped its own 400 cu in limit for intermediates, and Mecum calls the Stage 1 version the most powerful Buick built.
How rare is it?
Six separate kinds of rarity – never combined into one number.
Each kind of rarity is rated separately and never combined.
02Production & history
Production
Every figure says what it counts.
| What is counted | Figure | Basis | Status |
|---|---|---|---|
| Factory package production1970 GS455 convertibles | 1,4161 | Factory production | Independently researched |
Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.
History
Buick had sold the Gran Sport since 1965 as an option on the Skylark. For 1970 the engine grew to 455 cu in, rated 350 hp and 510 lb-ft in base form, and the optional Stage 1 package added engine and suspension changes for over 360 hp according to conceptcarz.
Mecum notes the rarity of a Stage 1 convertible with the M20 4-speed manual: 67 were built.
Variants
How each version differs from the standard GS 455 Convertible (1970).
No variants documented yet. Have a source? Contribute it.
03Specifications
Technical specifications
Engine
| Engine family | Not yet verified |
|---|---|
| Engine code | Not yet verified |
| Layout | Not yet verified |
| Displacement | 7,460 cc / 7.5 LFactory: 455 cu in · converted2 Independently researched |
| Bore | Not yet verified |
| Stroke | Not yet verified |
| Compression ratio | Not yet verified |
| Fuel system | Not yet verified |
| Power | 261 kW / 355 PSFactory: 350 hp · converted3 Independently researchedBase 455; Mecum (S1, S2) lists the Stage 1 as 455/360 HP and conceptcarz as over 360 hp. |
| Power at | Not yet verified |
| Torque | 691 NmFactory: 510 lb-ft · converted3 Independently researched |
Transmission & drivetrain
| Gearbox | Not yet verified |
|---|---|
| Gears | Not yet verified |
| Driven wheels | Not yet verified |
Chassis, body & dimensions
| Chassis | Not yet verified |
|---|---|
| Front suspension | Not yet verified |
| Rear suspension | Not yet verified |
| Brakes | Not yet verified |
| Steering | Not yet verified |
| Body construction | Not yet verified |
| Wheelbase | Not yet verified |
| Length | Not yet verified |
| Width | Not yet verified |
| Height | Not yet verified |
| Front track | Not yet verified |
| Rear track | Not yet verified |
| Kerb weight | Not yet verified |
| Dry weight | Not yet verified |
Performance
| Maximum speed | Not yet verified |
|---|---|
| 0–100 km/h | Not yet verified |
| Fuel tank | Not yet verified |
“Not yet verified” means no source has been checked for that value yet. Nothing is estimated to fill a gap.
04Colours & options
Factory colours & interiors
Original paint and trim, with the number of cars in each where a source gives it.
Not yet documented. Have a source? Contribute it.
Factory options & codes
Codes are shown exactly as written by the manufacturer.
Not yet documented. Have a source? Contribute it.
05Individual cars
Chassis register
Every documented car, with its colours, history and where it is now. Open a row for the full record. Known chassis are not automatically authenticated originals.
Not yet documented. Have a source? Contribute it.
Competition history
Every race result of the individual cars, in date order. Click a chassis number to open its full record in the register.
Not yet documented. Have a source? Contribute it.
Auction & sale history
Documented public sales of the individual cars. Click a chassis number to open its full record in the register.
Not yet documented. Have a source? Contribute it.
See one in person
Museums where an example of this car can be seen.
No example is documented on public display yet. Have a source? Contribute it.
06Reference
Identification guide
How to tell an original from a replica or later conversion.
Documents named by the auction lots as proof of a genuine car are the Protect-O-Plate, the line-number build sheet and the window sticker. Exterior details listed are GS 455 fender tags, the twin-opening hood design and the functional fresh-air hood.
Sources
Each number links to the exact facts it supports.
-
1
1970 Buick reference – production by model (TeamBuick.com) Level C
- 1416 1970 GS455 convertibles
-
2
1970 Buick GS Convertible (lot J209) Level C Mecum Auctions
- Original matching numbers 455/360 HP V-8 engine
-
3
Buick Gran Sport Level B conceptcarz.com
- 455 cubic-inch power-plant that produced 350 horsepower
- 350 horsepower and 510 foot-pounds of torque
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