LBP 10 x 1 3/4 brake drum availability?

i have a question. if it is an 8.25 rear end with 10 inch backing
why couldnt you just keep the drums and put the correct 2 1/2 inch brake shoes on it. isnt the brake hardware the same? then you wouldnt have to hunting for drums?

No, the backing plates must be a match for the brake drum width. There are different offsets depending on the shoe width. For example, 2-1/2" drums only work with the correct offset backing plates.