Cool Breeze (1972) on Netflix

Plot summary

Sidney Lord Jones learns the diamond trade from magazines while serving his sentence, and the knowledge gives him the idea for a robbery: $3 million in stones from the biggest diamond brokerage on the Pacific Coast. Once the parole board lets him out, he goes back to Los Angeles and pitches the job to Bill Mercer, the Money Man, and to "Stretch" Finian. Jones wants Mercer to supply $50,000 in seed money, and he wants the profits to open a community bank for black-owned businesses, a bank that could also launder illegal money. Mercer backs the plan, and the two men gather the specialists the job needs: Travis Battle, the Muscle Man; Roy Harris, the Box Man, once a safecracker and now a minister; and John Battle, Travis's half-brother and an honest businessman, the Driver.