And actually Optimus started as a 359 with extra goodies added talks about it in the behind the scenes. And I do believe i'll have to check the DVD again where he goes from a marmon to a modern truck actually is a Pete 387 & or 587 have driven both. As that's the movie where Megatron becomes a Freightliner Argosy. As a Class A CDL holder I've driven many brands but my user name says it all.