Okay, I re-read those SPECTRE stories over the weekend, they were actually pretty horrible, writingwise. Even the Gardner Fox story (issue 2), and Friedrich story (3) were pretty sub-par.

You can read them online at:
https://readcomiconline.to/Comic/The-Spectre/Issue-2?id=68081

The memory of them was better than the actual stories. Neal Adams has talent, but writing stories generally isn't one of his strong points.

There was a beautifully illustrated short piece "The Game" in HOUSE OF MYSTERY 178 with both story and art by Adams. Conceptually it was a very good story, but the dialogue was very clunky.

On HOUSE OF MYSTERY, Adams did stories in 178, 179, and 186.
And covers on 175-192, 197, 199, and 251-254.