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1971 Ford Mustang Mach 1 429 Cobra Jet
For 1971, the Mustang Mach 1 was a factory SportsRoof performance model, and the 429 Cobra Jet sat at the top of its regular-production engine ladder. Source records separate the ordinary C-code 429 Cobra Jet from the J-code 429 Cobra Jet Ram Air; both are treated here as 429 CJ evidence aliases unless the Ram Air or Drag Pak record is present. The available factory and reference records support a 429-ci four-barrel big-block rated at 370 gross horsepower and 450 lb-ft, with either a four-speed manual or C6 automatic behind it.
The strongest identity checks are documentary, not visual. A 1971 Mach 1 should decode as the 1971 model year with Mach 1 body identity, while a 429 CJ car needs the correct fifth VIN engine code: C for non-Ram-Air CJ or J for Ram-Air CJ. Service-reference material also warns that Super Cobra Jet status is not established by badges alone; the SCJ identification depends on a Cobra Jet engine code together with Drag Pak axle evidence, specifically 3.91 Traction-Lok or 4.11 Detroit Locker gearing.
Appearance records place the 1971 Mach 1 in the long-hood, SportsRoof 1971-1973 body family, with Mach 1 stripes/decals, lower accent treatment, honeycomb grille/sport-lamp themes, and available NASA/NACA-style hood and Ram Air equipment. Interior and chassis coverage is intentionally conservative: bucket-seat Mach 1 identity, optional console, instrumentation, Rim-Blow steering wheel, competition suspension, and power front disc brakes are included only where source records support them as 1971 Mach 1 or 429 CJ-era equipment.
Production evidence is less granular in public indexed sources than a Marti report or Ford database extract. The safest public figure captured here is the Marti-attributed total of 1,865 1971 Mustangs ordered with 429 CJ power, plus a cited auction/archive statement that 280 C-code 429s were installed in 1971 Mach 1s. More exact color, trim, axle, and transmission cross-tabs should be resolved from factory invoices, Marti reports, or Ford database records before public claims are expanded.