Martinus ;
The new drum won't fit because of the thicker linings ~ they need to be
" arced " (ground) to suit the drum .
Any professional brake shop should be able to do this but most folks just retract the adjusters all the way then knock the drums on snugly with a leather mallet then drive it gently and s l ow l y until the linings have conformed to the drums and there's no more drag.....
IIRC , Huck (rhymes with suck) brakes don't not have nor need primary & secondary shoes because they're pinned at the bottom .