Artwork is identical to Raab's signed work in Western Fighters #v1-12 "The Man With the Whip". Just look at the peculiar fish eyes and bulging foreheads. The inking reminds one a little of Frank Robbins.
The inking and smiling faces here are identical to Zolnerowich's signed covers. Other clues are the long downward wrinkle lines on the upper arm of suits, and much black inside the ears and at the corner of the mouth when smiling.
Art credits from Jim Vadeboncoeur, Jr.
Art credit from Jim Vadeboncoeur, Jr.