The "Comics Group" of the brand is covered up by the figure of the Stranger. On-sale date from 1970 Periodicals, Copyright Office, Library of Congress with a correction factor of plus 28 days.
This issue is a variant of Thor (Marvel, 1966 series) #178 [No price].
There exist further variants:
Thor; Stranger; Abomination; Odin; Balder; Sif; Don Blake
Synopsis
Thor and Sif, against the odds, defeat both The Stranger and The Abomination in battle and save Asgard from destruction. They celebrate their victory with a kiss.
in Super Spider-Man (Marvel UK, 1976 series) #163 (27 March 1976) [Reprints first 11 pages of story with two pages of original per page of reprint.], #164 (3 April 1976) [Reprints last half of story (8 pages) with each reprint pages comprising of two pages of the original plus splash page (by unknown artist).]