The picture is from a for sale ad here, not mine, that I linked in my post. You can check it yourself. My Challenger came with disks anyway.
And, the outer bearing stayed the same. Only the inner bearing was different. '72 down, 10" drums used an A2 outer and an A6 inner. '73+ 10" drums used an A2 outer, and an A17 inner. Feel free to look it up in your parts exchange.
Regardless, we're going to have the information soon enough.
@RevboxRyan can measure his bolt pattern and upper ball joints, they're going to be 5x4" and LBJ.
After the new 10" drums were implemented in '73 the 9" front drums went away. The 9" rears continued. It's in the TSB I posted and linked. I'm sure there was some carryover, but the TSB was published after the changeover happened.
