Here's how us old guys french headlights. Remove the headlight bucket from the fender. Drill 4 holes on the flange on the fender and remount the bucket from the backside, inside the fender using 1/4"-20 bolts. Take the original headlight trim ring and weld it to the fender. Grind your welds , and do whatever body work is necessary to smooth everything out nice. Replace the headlight bulb in the bucket and bolt back on thru the inside of the fender. The only drawback to this method is when aiming/adjusting the headlight beam you have to remove the bucket, turn the adjusting screw a bit, remount the bucket etc, etc until the alignment is complete.
