Why not upgrade?
I concur with the Roverdude on the R&R.
Why not upgrade your lighting? I recommend upgrading to 55W/60W H4 bulbs, since the Wagner or Sylvania sealed beams can vary in color. I put a set of EMPI's in my blue RR, they only ran me $16 each
and the price included the bulbs. Where as sealed beams will run you anywhere from $10-$60+ each at Schucks. I think the lighting pattern is better than the sealed beams as well. You can also go on Ebay and pick up a set of 7" Round Headlight Covers for a couple bucks. These'll help protect the glass lenses.
Environmentally justify it with: When a bulb goes out, you only have to throw away an item about the size of a D-cell battery vs something slightly smaller than a mini-basketball, thus creating less waste taking up space in a landfill.
(note: I have no affliation with the site I linked, just that I found the prices to be very reasonable and the sales people friendly.)