A photo of the headlight might help or a description. Around 1999-2000 manufacturers started changing from sealed beam to halogen. If halogen yes, you can get LED bulbs for them. If you have low/hi in a single bulb you'll need an LED that has a cut off shield for the low beam chip array to keep from blinding oncoming drivers.
Here's my post that explains how and why a proper beam pattern is important:
If you still have the sealed beam type, either pairs of 4x6s or single 5x7s you can get replacement bulbs that are LED. Stay away from the ones that look like a bunch of LEDS at the bottom of reflector cones. They spray light everywhere including tree tops, and of course the eyes of oncoming traffic. Prices vary wildly.
One issue is how much room you have behind the housing. LED bulbs for halogen headlights have fans on the back. You need room for the fans. There are bulbs available that use braided wire as a fan-less heat sink.