Boss 429 Mustang
Larry Shinoda · 1969
The Boss 429 Mustang is a 1969–1970 homologation special built solely to qualify Ford’s semi-hemispherical 429 cu in V8 for NASCAR. Its engine was too wide for the Mustang’s engine bay—requiring Kar Kraft to widen the front end. Priced at nearly $5,000 and limited to 1,359 units, it sacrificed usability, cost, and serviceability for one purpose: counting toward NASCAR’s 500-car rule. Larry Shinoda, who named the Boss line as a homage to Bunkie Knudsen, did not design this car—but its existence follows directly from the logic he established with the Boss 302.
