First step to restoring my 1974 Duster; Front End rebuild (coilovers needed?)

Update: thank you all!

after a pound of flesh and a little bit (a lot) of tears, I put the front end together and now it handles A LOT better.

EXCEPT!

There is this constant metallic squealing that I hear when I am driving. It stops when I stop but while I am driving it squeals continuously. Seems to sound like metal to metal. Coming from the rear, so it could be the rear drum brakes.

Any recommendation for rear drum brakes?

Thank you again!

Edit: Is there a market for used but good condition torsion bars? and beat up LCAs? otherwise I will throw those out....