what rotors fit?

Ok. If you want to challenge my credability too. Go ahead.
For me i have been professionally wrenching on cars since 1980 when i got out of the Air Force.
Having worked at a shop here in California that had a contract to work on State of California fleet vehicles, and CHP vehicles, on a rotating basis, i have seen, and worked on lots of different vehicles that this state had in their fleet of cars.
In all the time that i saw, or worked on state fleet vehicles that came into the shop, i never saw a Duster or Dart that had 15 inch wheels or tires on it. If you think someone was going to have fleet vehicles like this, wouldn't you think California would?
And i did LOTS of tire rotations, air pressure checks, and brake jobs, on these cars.
I don't know this guy Bruce, and he doesn't know me, and just because somebody's been posting on some internet web board for a bazillion years doesn't make it right to pass along information to some kid, on this board that now believes he's going to find a 76 Dart with 15 inch wheel and tires on it, or anyone else reading the posting.