Complex sentence: The FW07 became FW07B in 1980, and Regazzoni was replaced by the enigmatic Carlos Reutemann, and while he and Jones formed a successful partnership, they were not comfortable with each other.
Split into simpler sentences: The FW07 became FW07B in 1980, and Regazzoni was replaced by Carlos Reutemann. While the latter and other Williams's driver, Alan Jones, formed a successful partnership, they were not comfortable with each other.