Old Holley Valve Covers

[R68GTO]

These were on the car in the late '70's and laying in the PO's garage when I bought the car. PO had replace them with some cheap chrome "Camaro" script covers. Glass bead blasted the one, thought it turned out pretty good compared with what I started with. Anyone know when these were manufactured? Part number "14 OR 48B" is cast on the inside.
Any thoughts on if I should put a coat of clear on these after blasting to keep them from staining?

[NorCam]

I like the looks of those when cleaned up. Maybe a coat of Eastwood Satin Clear engine paint would help keep them looking that way.

[HawkX66]

Those had to be made by Mickey Thompson. They're basically identical. Even the part number under the cover.

[big gear head]

I don't clear any of my cast aluminum parts. If they get a stain on them I wipe it off with some carburetor cleaner and a rag.

[67 Nova Boy]

I don't clear any of my cast aluminum parts. If they get a stain on them I wipe it off with some carburetor cleaner and a rag.

X2...brake clean as well.

Dave
67 Nova Boy