Odd Casting Marks 87 430 Cylinder

so I was getting around to putting my 87 430 back together
well let me be a LITTLE more clear, getting all the parts back together
at this point I was looking my cylinder over and noticed an odd casting type marking
I have 7 other 430 cylinders and not one of them has this marking
anyone seen this before? or knows what it means?
looks like CW

Put it on a record player and spin it backwards, and let IT tell YOU what it means!

maybe its a makers mark from some porting? any mods visible?

quite a few. i'm no photographer so excuse the bad pics
knife ported, transfers done and intake cleaned up
I suppose it's someones signature, if so,,,who

I did but can't repeat it here

nice...try searching "cw racing"...seems they do port and cylinder work. they might be the outfit who did it

It could very well be exactly as justintendo said above.

Who Knows?

Not exactly the same CW logo but this may have been some of their earlier work. They aren't all that far from Nevada either.

I think it takes a moderator to edit titles. Probably a stamp?

yes it does I had a title corrected a few years ago