The Spectacular Spider-Man #171 (1990)
Writer: Gerry Conway
Artist: Sal Buscema
Puma and Spider-Man agree to settle the debt of honor thing once and for all. Puma invites Spider-Man to New Mexico to settle it. He says it can only end with one of them dying. They go through some rituals first of drinking stuff and overcoming inner demons and whatnot, then they are about to fight when the issue ends.