The Pick-Up (1968)

Frankie and Tony, two couriers whose job is delivering bags of money skimmed by a crime syndicate from Las Vegas gambling tables to their associates in Los Angeles, lose $1 million when they disobey instructions to make no stops by picking up two young women who are apparently stranded on the desert highway. The two thugs lose the money when the women, Dana and Marcia, suggest that they stop at a roadside motel, and there the women seduce Frankie and Tony, pull out guns, and speed off with the million dollars. Frankie and Tony hire an airplane, follow the women to an apartment in L.A., and brutally torture the women into telling where the money is hidden.