Switched to 10" rear drums, now parking brake is too tight

70 Duster, switched to 10" drums. Parking brake is now pulling too tightly mostly on the driver's side. Unfortunately the nut on the adjuster is rust welded on. Any tricks I could do to get it at least a few hairs looser without replacing the whole front line? If I were to replace the front line, is there a different length for 10" vs the stock?

Thanks