Editing Ford small block engine (section)

{{more citations needed|date=May 2010}}

{{Infobox automobile engine
| image = Shelby Mustang GT350 engine.jpg
| caption = [[#GT-350|289 K-code]] in a [[Shelby GT350]]
| name = Ford small block
| aka = {{unbulleted list
  | Windsor V8 (informal)<ref>{{cite magazine |url=https://autohistorypreservationsociety.org/1962-1968-260-and-289-cid-windsor-v8/ |title=1962 - 1968 260 and 289 CID "Windsor V8" |magazine=No Limits Magazine |publisher=Automotive History Preservation Society}}</ref><ref>{{cite magazine |url=https://www.classicandsportscar.com/gallery/35-uses-ford-windsor-v8 |title=35 uses of the Ford Windsor V8 |magazine=Classic & Sports Car}}</ref>
  | Challenger V8<ref name="Gunnell 1987" />}}
| manufacturer = [[Ford Motor Company]]
| configuration = [[Naturally aspirated]] 90° V8
| bore = {{unbulleted list
  | 4.000" (289, 302, 351W)
  | 3.800" (260)
  | 3.680" (255)
  | 3.500" (221)
  }}
| stroke = {{unbulleted list
  | 3.500" (351W)
  | 3.000" (302 & 255)
  | 2.870" (221, 260, 289)
  }}
| displacement = {{unbulleted list
  | {{cvt|221|cid|L |sigfig=2}}
  | {{cvt|255|cid|L |sigfig=2}}
  | {{cvt|260|cid|L |sigfig=2}}
  | {{cvt|289|cid|L |sigfig=2}}
  | {{cvt|302|cid|L |sigfig=2}}
  | {{cvt|351|cid|L |sigfig=2}}
  }}
| length = 27.50" (302, 351W){{efn| With 2001 Explorer–style water pump kit (Ford part ''M-8501-A50''). Blocks with older pumps are 1.25" longer.{{cn|date=April 2021}}<!-- If this statement is verified, the entry here should be reversed, with the measurement of 28.75" given for standard blocks and 27.50 in the note for a special water pump kit.-->}}
| width = {{unbulleted list
  | 21.00" (351W)
  | 18.75" (302)
  }}
| height = {{unbulleted list
  | 23.75" (351W){{efn|Ford measures engine height here from the bottom of the oil pan to the top of valve covers, excluding any breathers or oil fill tubes.{{cn|date=April 2021}}}}
  | 20.75" (302)
  }}
| block = {{unbulleted list
  | Cast iron
  | Deck height:
  | 9.480" (1969–70 351W)
  | 9.503" (1971–96 351W)
  | 8.201–8.210" (BOSS 302)
  | 8.206" (221, 260, 289, 302)
  }}
| head = Cast iron
| valvetrain = {{unbulleted list
  | [[Overhead valve engine|Pushrod OHV]]
  | Cast iron cam, Flat tappet (1962–84 302, 1969–93 351W)
  | Steel roller cam & lifters (1985–2001 302, 1994–97 351W)
  }}
| fuelsystem = {{unbulleted list
  | [[Carburetor|Carbureted]] (1962–1985 302, 1969–1991 351W)
  | [[Fuel injection|EFI]] (1988–1997 351W, 1986–2001 all others)
  }}
| fueltype = 87 Octane
| oilsystem = Wet sump
| coolingsystem = [[Water-cooled]]; jacketed block
| power = {{cvt|115–310|hp|kW|0}}
| torque = {{cvt|262–385|lbft|Nm|0}}
| compression = 9.0:1, 9.5:1, 10.5:1, 8.8:1, 8:1
| production = July 1961 – 2002
| predecessor = [[Ford Y-block engine]]
| successor = [[Ford Modular engine]]
}}
The '''Ford small-block''' is a series of 90° [[overhead valve]] [[engine block|small-block]] [[V8]] automobile engines manufactured by the [[Ford Motor Company]] from July 1961 to December 2000.

Designed as a successor to the [[Ford Y-block engine]], it was first installed in the 1962 model year [[Ford Fairlane (Americas)|Ford Fairlane]] and [[Mercury Meteor]]. Originally produced with a displacement of {{cvt|221|cuin|L|1}}, it eventually increased to {{cvt|351|cuin|L|1}} with a taller deck height, but was most commonly sold (from 1968–2000) with a displacement of [[#302|302]] cubic inches (later marketed as the 5.0&nbsp;L).

The [[#289|289]] small block powered Shelby Mustangs to the [[Trans-Am Series]] manufacturers championship in 1965 and 1966, while the [[Ford Boss 302 engine|Boss 302]] version did the same in 1970. The engine won at the [[24 Hours of Le Mans]] twice; once in [[1968 24 Hours of Le Mans|1968]] and once in [[1969 24 Hours of Le Mans|1969]], both times in [[John Wyer#J. W. Automotive Engineering Ltd|JWAE]] [[Mirage (race car)|Mirages]]. Other wins came from engines installed in [[AC Cobra]]s and the [[Shelby Daytona]] coupe.

The small-block was installed in several of Ford's product lines, including the [[Ford Mustang]], [[Mercury Cougar]], [[Ford Torino]], [[Ford Granada (North America)|Ford Granada]], [[Mercury Monarch]], [[Ford LTD (Americas)|Ford LTD]], [[Mercury Marquis]], [[Ford Maverick (1970–1977)|Ford Maverick]], and [[Ford F-150]] truck.

For the 1991 model year, Ford began phasing in the [[Ford Modular engine|Modular V8 engine]] to replace the small-block, beginning in late 1990 with the [[Lincoln Town Car]] and continuing through the decade. The 2001 [[Ford Explorer]] SUV was the last North American installation of the engine, and [[Ford Australia]] used it through 2002 in the [[Ford Falcon (Australia)|Falcon]] and [[Ford Fairlane (Australia)|Fairlane]].

Although sometimes called the "'''Windsor'''" by enthusiasts, Ford never used that designation for the engine line as a whole; it was only adopted well into its run to distinguish the {{cvt|351|cuin|L|1}} version from the {{cvt|351|cuin|L|1}} "[[Ford 335 engine#351 Cleveland|Cleveland]]" version of the [[Ford 335 engine|335-family engine]] that had the same displacement but a significantly different configuration, and only ever used to refer to that specific engine in service materials. The designations for each were derived from the original locations of manufacture: Windsor, Ontario and Cleveland, Ohio.

From 1962 through the 1990s, Ford small blocks engines were [[marinized]] by various companies (except for the {{cvt|255|cuin|L|1}}).

{{As of|2025|June}}, versions of the small-block remain available for purchase from Ford Performance Parts as [[#Crate engines|crate engines]].<ref>{{cite web|url=https://performanceparts.ford.com/engines/#302|title=Ford Performance Parts - Crate Engines |publisher=Ford |access-date=June 1, 2025}}</ref>