351 "H" 2V 1969-1973
Engine Type 8 cylinder Fuel regular gas
90 degree,
Overhead Valves (OHV)
    Intake Manifold cast iron
Displacement 351 cu.inches (CID)
Maximum torque 355 lbs./ft. @ 2,600 RPM
Valve train hydraulic lifters
Intake 1.9025"-1.9175"
Exhaust 1.533"-1.548"
Distributor single point
vacuum advance
Maximum Horsepower 250 BHP @ 4,600 RPM Point Gap .017"
  (1969-70) Initial Ignition Timing 6 degrees
  177 BHP @ 4,600 RPM Dwell @ idle RPM 24-29 (manual)
  (1971-73) 26-31 (auotmatic)
    Spark Plugs Autolite ARF-42
Firing Order 1-3-7-2-6-5-4-8 Spark Plug Gap .032"-.036"
(Number 1 cylinder on right bank, nearest radiator) Long Block Weight 530
    in lbs.
Bore & Stroke 4.00" X 3.50" Emission Controls  
(101.6 mm X 88.9 mm) IMCO (with Automatic, only NOx system)
Compression Ratio 9.51:1 California
IMCO (with automatic, only)
other 49 states
Oil Pressure (hot) 35 to 60 lbf/in2  
Mains 2-bolt RPM Rev Limiter  
Carburetor  

1970 - The 351 engine was used in Mercury Cougars & Montegos as well as the Ford Mustangs and Torinos.

1970 1/2 - The Ford Falcons had an optional 351 engine.

1971 - The 351 was available for use in the Mercury Cougars & Montegos and the Ford Mustangs and Torinos.

1971-1973 - The HO (High Output) Boss 351 engine was used only in Mustangs. Introduced in December 1970 and was available until the model year 1972. The 1972 Mustang Boss 351's also had ram air.


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