Nice work, John!
I wish I had some sculpting skills, but I feel lucky to reposition limbs, add hair or open mouths.
It definitely looks like "the Monster," but I would hesitate to call it "Karloff." Old Boris had a droopier face, more wrinkles, not quite so angular head shape ... the old Aurora kit had it nailed. This Monster has high cheek bones and looks like Karloff with a facelift. Replacement head, perhaps.
I love it, but it doesn't look like Boris.