Issue #39 is part two of the story begun in What If? #13. Four years later story was so great and fondly remembered that Alan Zelenetz and Ron Wilson revisited it in a less-good, but still pretty neat, story in which Conan returns to our universe.
And falls in love with Thor.
Not really. They fight and then get close to mouth kissing before Thor dies.
Unlike the first story, there’s no way part 2 was canon. So it’s not clear that Crom, the God of Conan comics, can actually lift Thor’s hammer…