New Kelsey Hayes 10 x 1.75 brake drums with BBP??

Mattax said
That has some correct information.
Yes there were /6 equipped B-bodies that used BBP rear drums with 1x1.75" shoes.
Drum p/n 2534 173

Given that these drums I have have the Pentastar cast into the front edge, I reckon it's safe to say that these are the rears as denoted above. Thanks for the clarification.