I have the same lights in both the '81 and '83 (4-lamp systems): Hella H4's in the hi-lo positions and std Sylvania halogen sealed beams in the hi's. The 83 has a relay on the high beams, and there is a definite improvement in light output over the '81. I don't plan on going with higher wattage, as the '83 lights the road a long way ahead, and I get oncoming cars flashing me from quite a distance as it is, and have to switch to low beams. I've owned or rented a lot of cars and the '83 lights the road better than any. Relays are in the job jar for the '81.