There were older models of Dinosaurs that this replaced that date back to the 70s, (I think 75 or 76, around the same time the Jungle Cruise opened I'm sure). You could tell them apart from the 'newer' ones straight away. I believe the dinosaur behind the T rex in the background is one of them. Just like the Victorians, back then people seemed to assume dinosaurs stood about 30 foot in the air on their hind legs and looked like big lizards ?. When this T rex was added I'm not sure.... some time in the 90s I'd guess. I think it was 2010 or 2011 that the newer Dino Trail opened.
I possibly do have more yeah. Might take a while to find them though