Complex sentence: The "Windsor" designation is a retroactive name for the family of engines sharing a common basic engine block design, adopted by Ford specifically to distinguish the displacement version from the "Cleveland" 335-family engine of the same displacement.
Split into simpler sentences: The "Windsor" designation is a retroactive name for the family of engines sharing a common basic engine block design. Ford adopted the designation specifically to distinguish the displacement version from the "Cleveland" 335-family engine of the same displacement.