In what year did Chevrolet stop using points on a 350 engine in truck?

Chevrolet transitioned away from points ignition systems on their 350 cubic inch truck engines in the late 1970s to early 1980s. There's no single year it stopped across the board. The changeover happened gradually as electronic ignition systems became more prevalent and cost-effective. You'd find some trucks still using points in the early 1980s, while others had already switched.