440 Engine in a Roadrunner

[garyneted]

A12. It was only available for sale for less than half a year, hence the designation “1969 ½ 1969 Road Runner with the 440 Six Barrel (A12 package)
The 1969 Road Runner 440 Six-Barrel (A12 package) was a formidable muscle car featuring a 440 cubic-inch V8 with three two-barrel carburetors, conservatively rated at 390 horsepower and 490 lb-ft of torque, powered by a 10.5:1 compression ratio. Key specs included a 4.32" bore and 3.75" stroke, a distinctive black fiberglass lift-off hood, heavy-duty Dana 60 rear axle with 4.10 gears, and performance-focused components for raw street power
Engine & Performance Specs

• Engine: 440 cubic inch (7.2L) V8 (Code A12)
• Carburetion: Three 2-barrel Holley carburetors (total 990 CFM at WOT)
• Horsepower: 390 hp @ 4700 rpm (factory rating)
• Torque: 490 lb-ft @ 3200 rpm (factory rating)
• Bore & Stroke: 4.32" x 3.75"
• Compression Ratio: 10.5:1 (some sources list 10.1:1)
• Valvetrain: Pushrod OHV, 2 valves/cylinder

Drivetrain & Chassis

• Transmission: Heavy-duty 4-speed manual (A833) or TorqueFlite automatic
• Rear Axle: Dana 60 with 4.10:1 gear ratio
• Suspension: Torsion bar front, leaf spring rear
• Brakes: Bendix drum brakes
• Tires: G70-15 Goodyear Polyglas Redstripe