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.
