I've got an '86, so the headlight buckets are different. I did the relay mod, and then went to H4 lenses for my truck. I didn't notice much of a difference in brightness with the stock bulbs even with the relays and larger wire, but the H4 lenses did make quite a difference in the light pattern on the road. The H4 bulbs have a very sharp cutoff, and tend to put more light on the sides and I like to have light on the road in front of me, so I can see the lines and what's coming.
To each his own I guess. My buddy has a BMW3 series car, and we installed the exact same H4 system in his car, except the lenses are 5 1/2"round, and even with the stock bulbs, the light is way better, so I'm inclined to think it may have something to do with the square lenses as opposed to the round ones.
After that, I bought some of the higher wattage blue bulbs which made the light very white on the road(HID like)(and definately brighter) but they burned so hot, they melted the connector at the bulb, and I had to replace that part. So, now I've gone back to the stock white bulbs, and installed a pair of hella drivers in the center of my bumper, aimed slightly high and to the right. I replaced the h3 55watt bulb in there with an 85watt h1 bulb, and that seems to really make a nice difference. I do get the odd flash from oncoming traffic though, so I know they're bright out there.
I haven't tried the sylvania bulbs. I just get the sense they're gimmicky, and won't actually provide any more light on the road.(55 watts is 55 watts?!)
Anyway, I'm more or less happy now when I have the drivers on, but I'm still not really happy with the stock headlights.
I've now got a '93 that I hope to have on the road soon, and it has different lights and lenses, so I guess I'll be starting all over again soon with that one, and if I don't get decent light from that unit, I'll definately be thinking of going with an HID system.
At this time of the year, I drive hundreds of miles in the dark and especially in the rain, and being able to see makes all the difference.
Here's a couple pics:
Lens comparison
..pic..
H4 bulb
..pic..
My relay wiring diagram:
..pic..
My relays wired
..pic..
Zigg