I bet Mike is talking about a truck with a correct wheelbase as well?
Not sure, we'll have to wait and see what Bowser (if I'm correct) produces. More important than wheelbase would be consistent wheelset specs and functional couplers. AZL wheelsets, unfortunately, are all over the place (I can't run them at all on my layout, much as I'd like to), and while they look nice, the couplers are virtually useless. Having said that, I understand AZL is working on their next-generation versions.
It's still going to come down to a lot of this, I'm afraid: