It’s the 6 and 8 cylinder Detroits that hit different. GM and Flxible each had both options though GM didn’t provide an 8 cylinder option until the 70s
The old route and your train doesn't bounce like crazy? I need to revist the route. The tracks were broken earlier, all the trains bounced unrealistically.
Nyc had them, utah transit, Connecticut transit, big blue bus in LA California, I think that's it. And I know Canada had them, because it's a Canadian bus manufacturer company.