The tube bumpers I build have very similar proportions. I trim the plastic fender liners all the way up to where they meet the inner fender, cut the bumper support off and rework it so it's only supporting the fender itself and doesn't hang down, remove the washer bottle and tuck the related wiring back up by the airbox, re-route the signal wiring and connect it all together into switchback bulbs in the corner lights, then I cut off all the excess sheet metal that hangs down in front of the tires on the core support. Everything below the headlight support bracket and to the outside of the main support where the body mounts are gets scrapped.