Not so sure about that. RM did the 65 Z16, 1966 Street Machine, 1967 SS/ Pro Street, and the 1970 SS/ Street Machine.
AMT (MPC?)Did the 1968, 69, 71 and 72 I think. Several people asked for a 73 Chevelle or Laguna S-3. That would be a pretty awesome kit. The Collanade cars haven't recieved much love in plastic form. I would have rather of had those than Chevettes, Omni's and Escorts like MPC kitted.