1969 M code Barracuda

Beautiful restoration. I've seen a couple of restored cars with bigblock engines having chrome valve covers. Was that an option on HP engines? I've never seen them on smallblocks. I know Hustle stuff had them.
The 383 Darts and Barracudas all have factory chrome valve covers, the 69 440 A-Body's all had painted valve covers. The GSS's had chrome valve covers because that is the way Mr. Norm wanted them...