honcho dates from the Korean War; not one of the OED citations relates to Western movies:
1947 J. BERTRAM Shadow of War VII. i. 212 But here comes the hancho. This boat must be finished to-night. 1955 Amer. Speech XXX. 118 Honcho. 1. n. A man in charge. (This is a Japanese word translated roughly as ‘Chief officer’, brought back from Japan by fliers stationed there during the occupation and during the Korean fighting...) 2. v. To direct a detail or operation. 1964 Sat. Rev. (U.S.) 10 Oct. 82/2 Jack Bullock, who honchoes the Curaçao casino. 1967 N.Y. Times 4 June IV. 1 Mr. Komer expects to be able to name these 45 key provincial honchos, and he hopes to place civilians in at least a quarter of the posts. 1972 C. WESTON Poor, poor Ophelia (1973) xiii. 77 It's out of our territory, but I'll call Pete Springer. He's honcho in that division. 1973 New Yorker 30 July 24/1, I was the first employee who was not one of the honchos.
-joe (Pancho) friday
OP
