Cool lights, I've done several euro conversions over the years (not to the 80 tho). Those height adjusters are cool, as long as you have the motor drive for them in your lights (presume you do).
The E code lights are US legal as stamped in the lense. Most folks have problems with the side marker lights(the very front quarter panel ones) that are usually deleted with the big body euros. There is some grey DOT enforcement area with regard to these, as the city lights tend to be an issue (BTDT). If those side markers fit, put them on. If they don't, you can use the parking light function in your turn signals (add 1157 parking/turn socket), and add any brand/marque DOT side marker light.
I've used E codes for almost 30 years, and find them to be excellent. I also find that DOT inspections can be really tough. I've actually printed off the DOT regulations and carried them in the glove box for those occasions. It's a hefty fine, and a lot of states are getting smart about those revenue dollars (read: PA especially).
Regarding high wattage bulbs. Coming from a Prorally background, as well as doing a few of these H4/H1 conversions to other marques, here's my suggestion... Put standard H4 55/65 in the outers and rig them normally low/hi (with relays). For the H1, put in a 100w bulb, and add a switch in the dash that activates them with the high beam circuit. This setup gives you standard 55/65 low highs for regular and high moisture driving, and 100w for when you realy want to light up your world. Much over 100w bulb, you will get some dangerous reflective feedback, in high humidity environs, and on highway going by really big signs (blinding reflective light for a couple seconds can really mess you up).
The biggest problem with high wattage bulbs in the H4 outer lows, is the 15degree upcut on the euros will piss off a lot of big trucks as you are passing them, btdt. Plus, given the size of the housing and the lense pattern, a standard bulb is just fine.
Yellow lenses or bulbs just reduce light output lumens by around 15%. Putting a yellow bulb on a high beam driving lense, isn't going to give you much improvement, nor is it going to make a good 'fog'. Best get a dedicated fog light/lense for that.
Dan, are these LHD euros available thru the US parts network?
Nice lights.
Scott Justusson