I had a set of Stage V Hemi valve covers mill, engraved, for a local customer, he wanted 572 Hemi on them. I had them polished before the work per his request, ended up those casting where not worth having polished They where wrinkle finished black originally.
I took them to a local machine shop out in Prineville, OR and he, the shop owner, did the software prep and then had his CNC mill do the work. My customer likes it so I'm happy over that. He put the engraving on the top 1/3 of the valve covers above the spark plug tube holes on the flat surface their
The motor is not here and I don't have any pictures of that work so I can't post pictures of it, sorry