This issue is a variant of Chamber of Chills (Marvel, 1972 series) #23.
Cover pencil and cover ink credits from Nick Caputo (April 1, 2006).
Al Milgrom tentatively confirms 2006 that he inked the cover, although he's not 100% sure when judging by the scan.
Cover letterer credit 2006 by Steven Tice.
original title: Terror Tale
This story is now considered to be the origin of Gorilla Man of the Agents of Atlas.
Featured in July 1976 and August 1976 Marvel comics.