Hcsstang,
I have an original, 3 row radiator from a 68 coupe (non CS), which I'm sure is the same radiator put in a CS (289) and it has "FoMoCo" on one side of the opening, and "W M O" on the other side with what appears to be an "8 0 8 1" under it. Sorry bro, that's all I have and I...