This issue is a variant of Power Man (Marvel, 1974 series) #47 [30¢ Cover Price]. There exist further variants.
Cover letters credit confirmed by Todd Klein in The Danny Crespi Files Part 12, posted 23 June 2017 on his blog (Todd Klein's Blog at Goodreads).
Overstreet Price Guide states this issue contains art by Barry Smith, but that is not true. (Fred Snyder, error 8861)