The Ford 429 Boss big block engine shares an origin story similar to Chrysler's 426 Hemi, creating a production engine to qualify the race version for NASCAR use. Before 1969, Ford used a 427 ...

As displayed at SEMA, the Boss 429, or Boss 9, as it is sometimes referred ... including the latest Ford EcoBoost models or an original FE big-block. Classic Recreations is a fully licensed ...

The Mustang Boss was either a 302 (4.9-liter) or a big-block 429. When Ford revived the Boss in 2012, the version was powered by the 5.0-liter Coyote V8. So, we can anticipate the use of Ford's 5. ...