The Taking of the Avengers! - Part 1 of 2-part story. According to a note by Frank Plowright in Marvel Comics Index #5 (November 1977), the story in this and the following issue were originally intended to run as one story as Giant-Size Avengers #5.
Spider-Man and the Cupcake Caper - Between pages 16 and 17 of this issue's story.
Ad featured in March 1976 and April 1976 Marvel Comics. Heck and possible Giacoia inks by Nick Caputo, Feb 2011.