Makes › Ford › Mustang › First generation › Mustang Boss 351 (1971) · Rare specification · 1971 Rare
Ford
Mustang Boss 351 (1971)
One-year Boss 351 Cleveland (330 hp) SportsRoof
Still being researched: full specifications. Everything shown is checked against the cited sources. Know more? Send us a source.
Photo: Charles from Port Chester, New York · CC0 1.0
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Contents
01Overview
At a glance
- Built
- 1,806 Built
- Years
- 1971
- Engine
- Not yet verified
- Power
- 246 kW / 335 PSFactory: 330 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 1971 Boss 351 was a one-year Mustang built around a competition-grade 351 Cleveland engine. It was meant as the Trans-Am counterpart of the new SportsRoof body, but Ford's retirement from most organised racing in late 1970 made that purpose moot.
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 production1971 Boss 351s built | 1,8061,2 | Factory production | Factory reported |
Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.
History
The Boss 351 replaced the Boss 302 and Boss 429 in the 1971 Mustang line-up, on the larger new body that was a little longer, wider and heavier than before. It was rated at 330 hp and carried standard ram-air induction, a Hurst-shifted four-speed and a 3.91:1 Traction-Lok differential. The engine was offered for one year only, and the 1972 Mustang had a detuned 351 HO instead.
Variants
How each version differs from the standard Mustang Boss 351 (1971).
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 | Not yet verified |
| Bore | Not yet verified |
| Stroke | Not yet verified |
| Compression ratio | 11.1:13 Independently researchedS2 gives 11.0:1. |
| Valvetrain | Solid-lifter camshaft3 Independently researched |
| Fuel system | Autolite four-barrel spread-bore carburettor (750 cfm per S2)3,4 Independently researched |
| Power | 246 kW / 335 PSFactory: 330 hp · converted3,5 Independently researched |
| Power at | Not yet verified |
| Torque | 502 NmFactory: 370 lb-ft · converted5 Independently researched |
Transmission & drivetrain
| Gearbox | Not yet verified |
|---|---|
| Gears | 44 Independently researched |
| Final drive | 3.91:1 Traction-Lok4 Independently researched |
| 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.
The Boss 351 had a four-bolt-main block, a solid-lifter cam, aluminium intake manifold and aluminium valve covers, an Autolite spread-bore four-barrel carburettor, and forged pistons.
Sources
Each number links to the exact facts it supports.
-
1
1971 Mustang Specs, Engine Codes & Production Level A 7173 Wiki
- There were 1,806 Boss 351 mustangs included in the above table
-
2
RM Sotheby's – 1971 Ford Mustang Boss 351 (Fort Lauderdale 2015) Level B
- 1806 1971 Boss 351s built
-
3
1971 Ford Mustang fact sheet Level B Over-Drive Magazine
- forged pistons gave an 11.1:1 compression ratio
- solid lifter camshaft
- four-barrel Autolite spread bore carburetor
- Rated at 330 HP
-
4
BOSS 351 Mustang Level B Mustang Owners Club Australia
- a 750-cfm four-barrel
- a Hurst-shifted four-speed
- a 3.91:1 Traction-Lok diff were standard
-
5
Pewter 1971 Ford Mustang Boss 351 is a one-year gem Level B autoevolution · 2024-06-23
- the R-code Boss 351 hit the streets with 330 horses
- Torque was just as impressive at 370 pound-feet
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