Everything Matt has said is true. Doing this technically makes your lights illegal, Some of you are lucky they don't do Inspections like they do in Europe, They inspect the output of your headlights and how they are positioned, and those of you pull the metal shroud out of the light, you would fail.
I know the light output sucks on these cars, my Suggestion? Besides a retrofit, I would make a Relay Harness (pretty easy to do), get some High wattage bulbs (80watts or higher, they tend to be made by Hella, don't buy those ebay POS saying they will up the output). I did this on my dad's Caddy, I should have grabbed so pics but they actually did help to make the beam pattern branch out a bit better, it was great but better.
And just to make it all fair, that is actually legal to do. Doing a Retrofit is technically illegal.