Final answer:
Based on the provided references, the specific winning project by Claude Vasconi and Georges Pencreac'h in the 1970s cannot be determined as it does not align with the included information about other architectural projects and figures.
Step-by-step explanation:
The winning project by Claude Vasconi and Georges Pencreac'h in the 1970s referred to in the question does not align with the historical information provided. Instead, these references discuss various notable architectural and art projects throughout history, such as the design of the Pompidou Center by Renzo Piano and Richard Rogers, the process of creating large-scale installations by Christo and Jeanne-Claude, or significant architectural texts by Le Corbusier.
It is not within these references that we find information about the specific winning project by Vasconi and Pencreac'h. This might suggest that the answer "Cannot be determined" is applicable based on the provided context. However, without additional details or surety, it is recommended to conduct further research to provide a definitive answer.