Sound to me like there are quite a few like me that wont advertise for free either. I believe that about the only pieces on my '31 that have visible manufacturers names are the gauges and the MSD ignition pieces - and those can't come off. My valve covers and air cleaner are ball milled Billet Specialties, but you have to look at the insides to find that info.

Not sure how the fabricated covers do as far as hiding valve train noise with roller rockers and a more radical camshaft.