Gimmie a Brake HELP

Are those axles intended for use with A body brakes? Are they original a body brakes? I believe the a body brakes are narrower and your axles are intended for b c or e body brakes.

Call Cass at dr. Diff. He will talk you through it.
Thanks
after further investigation under the axles site states
"Tech Note:
These 'A body' axles are meant to be used with 'B body' brakes, OEM 'A body' brakes will not fit.

So guess I'm taking everything apart & starting over! any chance the pads and guts are the same???