The exaggeration in some of these posts is pitiful, both directions.
The Chevelle rotors on stock spindles will work but only if you don't lower the car, and don't run a rim with too little backspacing and bigger than about a 215 tire. In other words it's an upgrade for a near stock car.
Otherwise you need to be considering other options, like the "zero offset" kit, or a dropped spindle. Even with those you need to pay attention to tire size and wheel offset.