OK so you want to use the early original metal chrome front eyebrow bumpers, modify them to have an integrated LED in the edge and then re-chrome them, correct? Did you fill the valance divot where the original light use to set? There are lights that could be installed on the underside of your bumpers that would not require any chrome work---not a fitted cool custom job but you would not have to cut the bumpers.
Ever consider installing a set of valance light pods and using the original style clear lens lights with the Jon Hass LED conversion? The converted lights can be used as daytime running lights, nighttime parking lights and blinkers that change to yellow when blinking.
I make the pods but you have to open a clearance hole in the valance. Was working on a modified version that would not require cutting the clearance hole---not finished yet.