How do you replace the points in 1939 V8 flathead?

To replace the points in a 1939 V8 flathead, first, disconnect the battery to ensure safety. Remove the distributor cap and rotor to access the points. Unscrew the old points, noting their orientation, and install the new points in the same position, ensuring the gap is set to the manufacturer's specifications. Finally, reassemble the distributor, reconnect the battery, and test the ignition system.