The Classic Space set 462 "Rocket Launcher" is the first set in the Alternate Project to have all of its alternate models with instructions.
Released in 1978, this set came with two minifigs and contained 60 pieces, and had a total of four alternate models.
462-1: Surface Transport
462-2: Missle Mover
462-3: Comm Center
462-4: Rocket Station
Disclaimer: These are not MOCs. I didn't create them. What I did was take a picture of the alternate and a list of parts for that set and figure out how it was built. The instructions for the models, however, are created by me.