Sorry I can't help with exact measurements.
But if your trying to have it shipped/towed, it's the 16' that's throwing every one off.
My Dutch Star is 11'8" and I doubt that a 1990 rig would be any taller than 12' top of the A/Cs.
Width wise 8' on the body and 9' outside of the mirrors.
If you have the serial number maybe calling Tiffin could get you exact measurements.
Highway rigs are 14' and overpasses on the interstate are 15' ;at 16' tall you couldn't drive the MH ,anywhere.