Small Block 335 Engines

The 335 Series consisted of versions of the 351 and 400 blocks. It lasted from 1970 to 1975.

351 Cleveland

  • canted-valve cyclinder heads.
  • bore and stroke of 4.00 X 3.50.
  • a light weight block to beat.
  • one of the most desirable V8 engines Ford had to offer.
  • a two barrel or four barrel setup.
  • From 1970 to 1971 the 351 boosted between 250 to 240 horsepower.
  • As time progress, the 351 Cleveland saw lessor horsepower until its’ demise in 1975.
  • the 351 Cleveland four barrel came with dual exhausts, a higher compressions ratio, larger intake/exhaust valves and four bolt mains during the first year of production.
  • the 351 Windsor, which belongs to the 90 degree V8 family and bears no resemblance or connection to the 351 Cleveland.

351 Cobra Jet

  • Introduced in the fall of 1971
  • mostly of four bolt mains, however there are some with two bolt mains.
  • possessed a spread bore bolt pattern cast iron manifold
  • Autolite carb 4300-D
  • Horsepower varied from approximately 280 during the first year of production down to 265 by 1973.


351 Boss

  • Most desirable
  • only available in the 1971 Boss 351 Mustang
  • Four bolt mains
  • high nodular iron crankshaft
  • solid lifter camshaft with screw in studs
  • adjustable rockers
  • an aluminum four barrel intake

351 HO

  • In 1972, Ford rolled the 351 Boss over into the 351 High Output for the new year.
  • Slighltly less desirable, the 351 High Output used the spread bore bolt pattern cast iron manifold
  • Autolite 4300-D.
  • With a milder camshaft, the output of the 351 HO was about 275 horsepower.

351 M and 400

  • By 1975 the 351 Modified was issued with Cleveland heads
  • a two barrel carb.
  • hydraulic lifters.
  • a cast iron intake manifold.
  • a two barrel carb.
  • the 351 Modified and the 400 which was introduced since 1971, are virtually identical with very few exceptions.