Ooops, hoser beat me to it!
WildYoats said:
As far as 80's go, personally I have not seen and style or type of xenon projector for them. But that doesn't mean they are not out there, I just don't know about them. So the conversion would be putting Xenon into your stock halogen housings.
They don't exist.
Your best bet is to get the aftermarket clear headlight units somewhere (I believe LX_TREME posted a link to them in the US) a while ago, and graft in projector HID's in there like "hoser" did to his 470:
https://forum.ih8mud.com/showthread.php?t=91642
I've seen such a conversion done to a lense with texture on it like that of the 80, but the result "might" be less than ideal. I don't know to what degree, if at all. That's why I suggest getting the aftermarket units I mentioned above for such a conversion. But that'll add like $300-$400+ depending on where you get them (trade your HB3(or was it 4?) high for an H1 high beams).
I have seen the JDM H4 set-up with bi-xenon work OK, but it seems to differ by which brand is used, as well as playing around with the shield. This does not really apply to you guys in the US because your high/low are separate.
I think a couple of guys on Mud have done the HID conversion with their OEM housings; LX_TREME and possibly Montana Cruiser, as well. You might want to ask them, if they don't check in.
WildYoats said:
In the next little bit I will be trying to scrounge up some ballasts and bulbs for my BMW's fog lights. I guess I could temporarily put the xenon bulb in my 80 headlight and see how skeewampus the light pattern is.
Johnny,
I'm sure I don't need to tell you that you might not want to do the HID for the fogs if that's what you are going to be using them for, but you're going for the looks, right?

Are you gonna color match the HID projectors or go yellow/amber?
Anyway, if one were budget conscious, I would probably just go with HIR's and put on aux. driving/spot lights on the bumper and be done with it.
Another option is to get aux./assist HID lights, such as Osram/Silvania Xenarc's:
http://www.sylvania.com/ConsumerProducts/AutomotiveLighting/HighPerformance/Xenarc/XenarcKits.htm
Not that you asked, but you can get them at
http://www.suvlights.com/ Here is the write up on installation:
http://www.suvlights.com/information.php?info_id=22
I think suvlights still sells them on e-bay, but I got them when they had them a little cheaper while ago ($275 or so with insured shipping to Utah).
You can remove the shield and make them into driving lights too (probably not that great as they are pretty small), or they offer yellow film to put on as well.
Anyway, this might be the easiest and cheapest way to go true HID.
Good luck!
Mot
Here are some pics borrowed from their site:
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