Ah- good idea. Well, if you're going to keep them, you could get a set of wide beam projector driving lamps and mold those into your bumper as headlights.. but it may not be too legal. I would suggest trying to remove your flip-ups and fabricating a clear housing to cover up the hole... then getting some projector units from an Audi or something to drop in and use for low and high beams. This way you still have your headlights at the legal height, you'll have minimal changes to your bodywork, and you'll have a much different look than most Preludes of your generation.
Search for some HID conversions on the web. There's tons of information there on people who have custom made their own headlights with parts from other cars.