Found a Source for 10” rear drums with 1-3/4” shoe

I've got good news for you. You have the right drums.

I went out to check my drums just to verify. The "friction surface" on my drum is 2-1/8" wide. The friction surface on the drum has to be a little wider than the brake shoe width of 1-3/4". In this case, you have 3/16" clear on each side.

You're good to go -- or stop, as the case may be.