SBP 8 3/4 drums

Hey guys, just got the eight and three-quarter rear end bolted up got all of the brake hardware put back on. I realized when I upgraded the backing plates I will need the 10“ x 2“ brake shoes which I now have. I have a set of 10“ x 2“ brake drums for a large bolt pattern. Can these be drilled to fit the small bolt pattern? If not, is it easy to find 10“ x 2“ rear brake drums with a small bolt pattern?