Brake shoe size

73 up left, 72 back right100_4889.jpeg

shoes look very similar except 73 up shown is 10x2-1/2 and 72 back is 10x 2-1/4.
Not sure what all has to change for a wider shoe, other than the obvious, drum, shoes...
Wouldnt the plate have to change as well to keep the geometry of the cyl. correct?
Or is there a different wheel cyl....hmmm...
100_4890.jpeg100_4891.jpeg