This issue is a variant of Conan Annual (Marvel, 1973 series) #12.
1. Original indexer suggested Vince Giarrano/Ernie Chan
2. Fred Snyder suggest Geof Isherwood pencils/inks. Cover signature is GI as in Geof Isherwood. Art resembles other Isherwood cover art. (http://errors.comics.org/show_bug.cgi?id=4250)
Continued in Conan the Barbarian (Marvel, 1970 series) #200