Rear backing plates delima

[wmws]

There are two thicknesses of brake linings. One is 3/16 which is standard. You may have the thicker 1/4 which could be causing the problem. I tried the 1/4 but had to go back to the 3/16.

 

[The Master Cylinder]

I am just now joining, but seem to be having a similar issue and would appreciate some guidance. I am rebuilding the back brakes and replaced the roller track assembly, purchased new cast iron drums/hubs and had the shoes arced. I see that the shoes aren't centered while the adjusters are turned all the way down so I believe that much has been eliminated.
I suspect that the roller track is off slightly (by perhaps .010) on the 'upper' side though there was no real adjustment when bradding in the new plate.
The drum won't go on all the way as a result. It seems that sanding the shoes down will lead to unintended consequences.
What now? Do I need to get new backing plates with the roller plate centered better? How does one adjust the shoes in a situation like this?
Thanks to all with ideas!

As was stated above by Blockhead in post #13, the top of the rear track should be 1" from the rivet. See Model A Ford Mechanics Handbook Vol. 1 by Les Andrews (Red Book) page 1-41.

 

[KR500]

If you are using newly installed cast iron brake drums also keep in mind that they are sold .025-.030 undersize so that they are turned to the 11.00 dimension concentric to centerline of hub. Mel Gross takes care to do this I am sure.