Kicking Myself!
In the parking lot at Yaquina Head Light a few years ago, sat a Dodge based C and I noticed it had 16" wheels. I hoped to talk with the owner but the rig was gone when I got back from my climbing tour of the Light.
So, somehow, it got done. I did not look to see if the Hub Piloting was done right.
This Site is run by an OP on this forum and there's 16.5" tire information. Sorry, no rim interchange, but it does discuss OFFSET. Please be sure you understand it. Offset is not the space between the mounted tires. Offset is built into the rim and the proper offset on a pair of rims creates the correct space between the tires. Read the 16.5" page carefully,