Snyder’s head question

[walls]

I have what I believe is a 6:1 Snyder’s head
I pulled it off a B engine that I bought last year.

Using that as a frame of reference, I’m assuming the head on my coupe also has a Snyder 6:1 head.
I haven’t driven it since I bought more than a year ago and I’m getting ready to get it running/driving.

What are the odds these same marks without being the same head?
Or do all model A heads have these “dots”?