351 Windsor andCleveland
The Windsor (W) and Cleveland (C) designations are only for the 351 engine size.
Basics:
351W introduced in 1969 and still in production to this day.
Wedge combustion chamber (like small block Chevy)
Lots of good aftermarket parts available. Inexpensive aftermarket cylinder heads are available and provide serious power increase.
Easiest Ford engine to get lots of power from cheaply.
Constant development for 32 years by Fomoco and the aftermarket.
351C introduced in 1970 and discontinued in 1974.
Made for a few years afterward in Australia.
Canted Valve combustion chamber (like a mniature Big Block Chevy).
Poor selection of aftermarket parts.
Block design poor, very hard to find a usable core.
Was dominant in NHRA classes in the 1970's.
Head design basics are used in current Ford ("Yates") Nascar engines, however those parts are very expensive and not interchangeable with production engines.
Expensive to modify, hard to find machinists who know how to work on one.
Only engine available in 1972 - 1973 Cougars.
Royce Peterson