This issue is a variant of Power Man (Marvel, 1974 series) #26.
1) Al McWilliams credited by original indexer.
2) Vince Colletta credited by Nick Katradis, from original art (error 2386).
Janos character is a homage/take-off of The Nightstalker film- even has similar
name - Janos Skorzeny vs. Janos Trevorik. (Info by Fred Snyder (error 9419)).