Looks like the announcement for Plymouth was 8/21/70 for the return of Lemon twist. All the color brochures etc. for the beginning of the model were printed without showing FY1 , so people were pretty much unaware it could be ordered unless the dealer told them specifically . I had always thought they dropped GB7 when they added FY1 back in , but it looks like GB7 was dropped on 11/9/70. And since it was mentioned above ..GY4 Honey Dew was added on 3/16/71 .
