This is an Original GM Cooling Fan #3947772 and Date Code C70 for 1970 Chevelle, El Camino, Camaro, Impala, BelAir, Caprice, Nova. Note: this is an 18" with 7 Blade fan with Blunt ends on the blades. Will fit 69 and 70 Models with High Performance and Heavy Duty Cooling. See Pictures