If it had a powerglide transmission,then its possible for it to have a 10 bolt axle otherwise it should have a 12 bolt. Look under the car. All SS's (except the L78 which won't have a 10 bolt axle) have two fuel lines, a larger 3/8"line and a smaller 5/16" return line. Of course it should also have power front disc brakes, 5 leaf rear springs, etc.