Maybe the Pontiac LeMans should get an open topped variant; all jokes aside all of those vehicles look really good, excellent work.
If you ever need reference for trailers, especially unique versions, I do have some photos of some trailers from railroad owned TOFC rosters, a few of those would fit nicely (most of which are fruehauf Z-vans iirc).
I have a photo for archival purposes, A strange LA county rig that was white, likely picked up like this in a annexation of a smaller department. (Note the crown badge on the side of the cab)