The only manufacturers that could make full size cabovers that can comply with our emissions regulations is Volvo and Scania. Freightliner dropped out of the market when they phased out the Argosy, even then that was a glider.
My brother sent me this earlier this morning. https://ifunny.co/video/hMegM6PGB?s=s @drvrtech77 This is right up your alley!!
Cabovers that are still being produced by manufacturers like Volvo and Scania use DEF and or DPF. Mind you,these trucks aren’t sold here in the USA(except for Scania),mostly in Europe,Australia and New Zealand where emissions are as stringent as the vehicle length regulations. The last cabovers that were sold here stateside (Freightliner Argosy) were sold only as glider kits,despite the fact the same trucks were built as complete trucks and exported to other markets (Australia,South Africa and New Zealand) using AdBlue(DEF by any other name).
Does it bother anyone else that those who produce informational videos about trucks don't bother to learn trucking lingo? Most notable is the cab of a tractor being called a "cabin". The other is a conventional tractor being called a "long-nosed cab". Yes, my life is obviously going well if this is what I have to complain about.
Back in the late 90s there were still a lot of cabovers running. But drivers didn't like them. Many companies switched to hoods to boost recruitment. When JB and Schneider announced that they were getting away from cabovers, the truck makers quit producing them for the U.S. market. By that time International was the biggest makers of COEs.