Since this is an independent rear suspension, I'm leaving plenty of material here so I can bolt up a bearing hub to support the inner u joint on the axle shaft. Start big & whittle it down to fit...eyeball engineering...
More procedure. My solution to not having a rotary table.
Washer keeps the aluminum work piece slightly off the vice. Nuts are in the vice. Everything is solid & plumb.
Accounted for the thickness of the washer with a piece of .092...used a piece of .062 & set the depth stop loosely to it. This will give me a 1/16"...1/2" @ 1:1... base for this side of the side cover where it bolts to the center section.
Centered the lay out mark in the vice opening & with the bit centered on that mark it will run with the axis up the ramp to the center of the piece.
I'm employing trippple quadruple redundancy in this set up...I've got an entire sunday invested in the side covers at this point...got to get this right, the first time!!!