In 1956, my high school band from Bellingham, Washington was selected to march in the Rose Bowl Parade on New Years Day 1957. It was a great 13 day trip but most of all we had 3 Scenicruiser busses. They were running from Chicago to Los Angeles at the time as they were brand new but my dad worked for Greyhound and made a deal to get the 3 busses for our trip. Had to be a great PR item as Bellingham is near the Canadian border and no one north of LA had seen these.. Still a very vivid memory for me.
Good luck with your model.