Photos of 986 with the front bumper off

[itsnotanova]

Are you dead set on having oval lights? If not than maybe a light bar might be easier to mount and lighter. I have a feeling that those lights will stick out farther than you expect. The weight and distance from a sturdy mounting point might make the lights bounce up and down like crazy. Just another idea, what about installing a third radiator hole on the bumper cover and mounting the light bar behind the radiator using the mounting tabs for the third radiator? Or cutting round holes into your bumper cover and mount the oval lights farther back and flush with the cover?
If you're set on mounting lights in front of the bumper, I would suggest mounting the light support bar either to the radiator support brackets or where the radiator brackets attach to the body