Re: Wanker in States calling Cleveland a Big Block...
I hit him to. Here is what I posted:
How do you figure a 351C is a big block? You can bolt C heads on a 302 or a 351W. A 351C uses the same motor mounts and bellhousing as a 302/351W. And a 351C has a lower deck height than a 351W, 9.2" vs 9.5". A 351C is a Ford 335 Series engine. Like the Windsors, it isn't a small block and it isn't a big block because it isn't a Chevy.
A side note on the 351 Cleveland issue: The Cleveland is NOT a small block ford. It is not a big block (FE Series) either. It is part of Ford's 335 family of powerplants which includes the 351-400M (Modified or Michigan Series.) 335 Series engines' heads and some other components are interchangeable. They also share the bellhousing pattern with the big block family and will not bolt up to small block bellhousings or earlier transmissions like the C6 with the integrated bellhouse. Simply because the displacement of the 351C engine is the same as the largest small block does not also make the Cleveland a "small" block. It is the block casting and style that earn SBFs this classification, not the displacement. "
Perhaps as is suggested on the same link it should be called a "middle block." A Google search of "351C middle block" with show some support for the case that it's not a small or big block.
[/QUOTE]'The Ford 351 Cleveland, on the other hand, belongs to Ford's 335 engine family. This thin-wall cast BIG SMALL BLOCK uses the smaller 14mm spark plugs, has a separate front cover (bolted to the block) housing the timing chain and routing water - so that water does not go through the intake manifold, features beefy main caps (wide enough to drill for 4-bolt mains), a poor oiling system, and uses different heads for 2V & 4V versions. The heads make all the difference and these fire breathing babies make this motor the legend it is. On the 4V, the valves are HUGE, measuring 2.19" intake and 1.7n" exhaust. Valves this large are only possible via a canted valve arrangement, forming what Ford refers to as a "poly-angle" combustion chamber. The valve covers are not straight - the front is flat and parallel to the ground, but a curve twists the rear parallel to the head. They are attached by 8-bolts and when removed, there is a 4 cast into the corner of the 4V and a 2 cast into the corner of the 2V (at least in 1970). The canted valves are the dead giveaway. [QUOTE]
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