* Engine code: D0
* Displacement: 351 cubic inches (5.8 liters)
* Compression ratio: 8.5:1
* Horsepower: 266 hp @ 4800 rpm
* Torque: 325 lb-ft @ 3200 rpm
* Carburetor: Autolite 4300 4-barrel
* Intake manifold: Ford cast aluminum
* Exhaust manifolds: Cast iron
* Distributor: Ford Dura-Spark
* Ignition coil: Ford Dura-Spark
* Spark plugs: Autolite AGSF-32C
* Engine oil: 10W-40
* Transmission: 3-speed automatic or 4-speed manual
* Rear axle ratio: 3.00:1
1973 Ford Mustang 351C 4V
* Engine code: D1
* Displacement: 351 cubic inches (5.8 liters)
* Compression ratio: 8.0:1
* Horsepower: 266 hp @ 4800 rpm
* Torque: 325 lb-ft @ 3200 rpm
* Carburetor: Autolite 4300 4-barrel
* Intake manifold: Ford cast aluminum
* Exhaust manifolds: Cast iron
* Distributor: Ford Dura-Spark II
* Ignition coil: Ford Dura-Spark II
* Spark plugs: Autolite AGSF-32C
* Engine oil: 10W-40
* Transmission: 3-speed automatic or 4-speed manual
* Rear axle ratio: 3.00:1
Differences between the 1972 and 1973 351C 4V engines:
* The 1973 engine has a lower compression ratio than the 1972 engine, which reduces the risk of detonation and allows the engine to run on lower-octane fuel.
* The 1973 engine has a different distributor and ignition coil than the 1972 engine, which improves ignition timing and spark quality.
* The 1973 engine has a different intake manifold and larger exhaust manifolds than the 1972 engine, which improves air flow and exhaust scavenging.
* The 1973 engine uses a different type of spark plugs than the 1972 engine, which are designed to withstand higher temperatures and provide a longer spark duration.
