I could be wrong, but suspension parts, including K member, should be black (semi-gloss) and steering parts natural metal finish. Except for the lower control arms and those are natural with half dipped in cosmoline (as a corrosion preventative) to give it a goldish color.
For our project 1971 Dodge Challenger, we're retaining the OEM torsion bar suspension the way it was, but making modifications to compliment the increased grip.