h4 upgrade from sealed beams. I run the phillips +80s in my car and my wife's and they a bucket of improvement over standard. A bit pricey at about $60 or $70 for a pair of globes, but i've had them 2 and a half years now and still running sweet.
If you wanted to go over the top. h4 and wiring upgrade and put in 130watt globes

you will melt the semi sealed reflectors, but lots of light
