Skylab Station: an alternate historical take

After the Apollo Program ended, the United States had Skylab, that country's first and only space station until it became a partner to the International Space Station several decades later. There were two Skylab Orbital Workshops built, but only one was flown. In this alternate timeline, a second order of Saturn Vs was placed and NASA received just sufficient funding to allow both workshops to be orbited; shortly thereafter, a core Power Node was sent into orbit, allowing the two workshops to dock and form the Skylab Station. When no more Apollo CSMs were constructed a small shuttlecraft was built to serve as a lifeboat, and when the Space Shuttle came online a few more modules were added. This is the final configuration of Skylab Station, through its deorbiting in 1986.