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

oldpunko, anything w/ K-H rotors would be SBP (4"D bolt circle), plus BBP didn't start until 1973 in A-bodies. The Tire Rack site shows how to measure bolt circle. I think all cars w/ K-H front disks had 10" rear drums. Don't know if they were still 1.75" wide in 1972. Go to rockauto and look at 10" rear drums for those years. Centric usually has a nice drawing w/ dimensions. Also, there was a rare 8.75" rear-end on some sporty cars. I recall reading they had unique rear drums w/ a bell shape, so search if your rear is such.