headlight upgrade

The 7 inch round plastic housings for modern bulbs are available at ebay etc..
Tips I have that might save some trouble and coins... Buy a second connector for the left headlight. Reason being, That left connector has 2 wires in one terminal. The right connector has only 1 wire in each terminal. Those original wires are too small for the current they will be conducting so here's what to do, Cut the 6 factory wires approx 1 inch behind the left side headlight connectors. Pick the small crimped limbs that hold the wire insulation open and clip them off. Pull the insulation off the 2 wires and combine the wires. You now have a large enough single lead in these factory connectors terminals. Add sufficient wire gauge and length from the relay terminal to headlights.
You'll find the factory grounded both bulbs at the left side. Change that too. Ground each bulb near each bulb.
Placing 2 of the new larger gauge wires in the 1 relay terminal is a little difficult but can be done. Result is a separate wire to each bulb.
Fewer cut/splice points equals fewer problems in the future.
Buy some uninsulated crimp connectors at the part store along with heat shrink tubing. Crimp and solder the wires.
I install 2 layers of heat shrink tubing cut at least twice the length of the connection.
Dont buy the cheap relays and connectors at ebay. They are junk.
A new, quality, Echlin SPDT relay connector alone will cost you 10 bucks. So get those connectors at a parts yard for less.
The "do it yerself" upgrade is a chore compared to buying a kit from somewhere like Painless. Time ?, Skill ?, Money ?, You'll have to decide which route is best for you. Hope this helps