So, kinda bad news. In looking for the volvo, my wife is having serious problems getting in the truck. She had knee surgery (meniscus) that has left her with pain when climbing up stairs. Doing a ladder, like the step design of HDT , is really hard. And the step spacing makes it more difficult and painful.
Our international 4700 is more akin to stairs, which is doable for her. So, it looks like we stay with our MDT. (Sad face).
Our issues with the 4700 are cabin noise and lack of power and rough ride. I can mitigate lots of the noise by adding sound insulation (doors, under hood, under cabin), exhaust resonator & better muffler, quiter tires, and re-upholstering the headliner with fabric & padding, etc.
Power... water injection is about all we can do with aluminum pistons.
So there we are. Aging is a bitch.
Bob & lisa