rear brake drums
Next are photos of both front and rear drums the measurement photos came out crappy,dang things kept moving while holding up the drum, tape measure and pushing the button on the camera,,GRRR !!
But the difference is the front drum contact pattern is 2 5/16'' while the rear drum is 2 1/8'' I see now that you can machine off the difference once you have the drums in hand to look at.
The brownish color ones are the front. The shiney silver ones are the rear.