I also remember the Sinclair dinosaurs. They also appeared at the 1964-65 World's Fair in Flushing, NY. But the Walt Disney dinosaurs were better because they used Animatronics and moved!I faintly remember seeing these vehicles when the GM Futurama came to our area when I was a kid.
I also seem to remember a travelling show by Sinclair Oil - with large dinosaurs as the highlight. Statues, not real ones - - - I'm getting old, but not that old!