brighter head lights?

See here. Put in Cibie H4s if you want excellent headlamps (but they're costly), or put in GE Night Hawk H6024NH sealed beams from www.amazon.com (search H6024NH) if you want decent and cheap but not very long lived. Don't get Sylvania, Wagner, or other junk. Whatever lights you put in, make sure they're fed by relays, and you can also upgrade the car's other exterior lights (see here).

For more detailed headlamp info, see here and here and here.