Thanks so much to all who 
responded!  I now have a contact for both used and NOS drums, and if that 
doesn’t work out, I’ll convert to 4-wheel disk brakes.  J
 
One more issue:  My 
original 14-inch wheels will not fit around the new disk brake calipers.  
My shop is recommending I switch to 15-inch wheels, and use the 15-inch hubcaps 
from a 1956 Dodge – but I’d much rather keep the ’57 look.  Can anyone 
advise me on a 14-inch Mopar wheel, circa late 60s to mid-70s, that would 
accommodate disk brakes?
 
 
Anyone have a source for NOS or GOOD used rear brake drums 
for a 1957 Dodge Custom Royal?  
**** OR ****
Can anyone point to the most compatible Mopar rear axle/brake 
assembly (circa late 60s to early 70s) that I can swap with the original?
 
Let me explain:
 
I just installed a disk brake conversion kit in the front and 
converted to a dual master cylinder (from a ’67 Dodge), but still need to 
replace the rear drums.  The brakes are unique to Dodge for the 57-58 years 
only.  From what I can find out, these drums are not being 
reproduced.  I can’t locate NOS drums, and the used ones I looked at are 
too far gone.  So . . . my remaining option is to swap out the entire rear 
end, so I’ll have an easier time servicing the brakes.  The car is in great 
shape, but it’s not a trailer queen.   I drive it – a LOT – so I need 
the brakes.  
 
Can anyone help?
 
Thanks!
 
John Williams