I replaced the stock sealed beam lights with Hella lenses and Piaa H4 bulbs.  The total cost was about $200 and took about 2 hours to complete.  You have to remove the entire headlight assembly.  After you install everything you will have to adjust the lights.  I have images of the parts you will need below.  Piaa also makes a upgrade wire harness (below) for the bulbs.  I didn't use it.  I purchased the lenses and bulbs from a local speed shop.  You can also get the bulbs online from