From Ford Wiki
Boss 351
| Automotive industry | Ford Motor Company |
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| Type | 90° V8 engine |
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| Production | 1971 |
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| Predecessor | Boss 302 |
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| Bore | 4 in (101.6 mm) |
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| Stroke | 3.5 in (88.9 mm) |
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| Engine displacement | 351 cu in (5.8 L) |
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| Block alloy | Nodular iron |
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| Valvetrain | Poppet valve Pushrod engine |
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| Power output | 330 hp (246 kW) @ 5400 Revolutions per minute |
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| Torque output | 370 lb·ft (502 N·m) @ 4000 Revolutions per minute |
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| Compression ratio | 11.1:1 |
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The Ford Boss 351 is a modified 351 cu in (5.8 L) 335 "Cleveland" V8 fitted with 4V (4V meaning 4 venturi (barrel) carburetor, not 4 valves) style closed-chambered 351C heads. Available only in 1971 production, it uses the basic four-bolt Cleveland block and Crankshaft but both are constructed from high-strength Nodular iron. The Cylinder head is modified for better airflow and solid lifters. Aluminum valve covers added to the look. The forged Connecting rod were shot-peened and Magnaflux for strength, and Forging domed Piston gave an 11.3:1 nominal (11.1:1 advertised) Compression ratio.
- Bore/stroke ratio: 1.14:1
- Bore spacing: 4.38 in (111.3 mm)
- Connecting rod length: 5.78 in (146.8 mm)
- Compression ratio: 11.3:1 (64.6-67.6 cc quench type chambers)
- Piston compression height: 1.631 in (41.4 mm)
- Carburetor: Autolite 4V, spread bore, 750 Cubic foot/min
- Fuel: Petrol
- Valve lash cold: .022 in (0.6 mm) intake and exhaust, .025 hot
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