I'm not sure about how detailed the engine will be , there's still a lot of other work that needs to be done .
I've exchanged emails with a person more knowledgable than me about the history of Mr . Unswitchable and he's convinced me that the original color was probably Carousel Red , which is suppossedly the same as Hugger Orange . I'm not sure it was available in '67 but it looks really close so I've picked up some Model Master Hugger Orange and will give it a try !