Thanks all:
I think we will just use the Cal Tracks or, Ladder bars with the narrowed 8.75 that’s already narrowed for the car.
Just back-brace it / set it up and go.
Have good axles already and it matches rub width etc.

Still thinking on the front .

Everything else is just about getting to work.
May run the car a couple year- dusters are fun cars, nice weight .

Just got back from a dyno day- always tired afterwards, not quite sure why a full day at engine dyno is so draining but- for me it is.

Perhaps a few pics of this old car tomorrow .

Thanks again to all for your help.