These are mx73 rear brakes made to fit the yr22 tarago diff in my ke30 corolla
I butchered the mx73 rear arms to get the profile correct then had custom brackets plasma cut to suit
I had my mate machine up this pretty piece of alloy so after boring out the mx73 backing plate to fit over the yr22 bearings i could drill the holes in the right spot
Then I welded the caliper bracket onto the housing
and Hey presto mx73 calipers and handbrake on a yr22 diff... (in a ke30)
I also had to put a 5mm thick ring on the axle before the wheel bearing (just to get enough clearance for the handbrake mech behind the axle stud heads