The design has changed a bit. I am making bearing retainers that will accept A10 bearings and seals minus the secondary lock ring. These bearings are a caged tapered roller bearing and should work well with the axle side load always pushing inboard.

The axles will be shortened and have the bearing surface moved outboard to make the center section as narrow as possible. The Turbo-Coupe rotors were too small and I couldn't fit the calipers in without hitting the differential housing, so I am using Volvo 850 rotors turned around backwards. To center all this up I am having the axle brake drum centering ring removed and boring a step into the end. I will have a stepped piece made that fits the axle counter bore, rotor center, and driveshaft yoke inner flange.

I decided to not use the Corvair trailing arms but instead use the Jag style of lower control arms and carriers. I am using the Corvair half shafts, bearing housings, and outer stub axles. I had parts waterjet and I welded them together to create the outer carrier and bolted the Corvair bearing retainers to it.

I am using 4 bar end links and tubes for the lower control arm. I will be welding a plate top and bottom to create a boxed lower control arm. I will have a strut rod from the outer front of this control arm angled forward to be inline with the inner pivot point to control any fore and aft movement without binding.

To answer the above question. 90's T-bird/Cougar had an independent rear but I wanted to make my own  and had this design in my head for the past 25 years. I also had some of the parts for that long as well. The whole thing is going to be open in the rear so you can see all the parts so it has to look good as well.