After discovering about the Star Wars fandom I learned a lot but also found slash fics and slash art from the 80′s so presenting you:
Vintage 80′s SkySolo fanart from some of the zines of that time
Bonus, some Han/Chewie:
(source: http://fanlore.org/wiki/Organia,http://fanlore.org/wiki/The_Rest_of_the_Garbage,http://fanlore.org/wiki/Elusive_Lover)
Just a note: there was no public Han/Luke slash until the 1990s. Most of these zines were published then. http://fanlore.org/wiki/Han/Luke