On the SC300, the lower back of the front bumper actually floats in mid-air. The front bumper attaches (hangs, really) to the bottom leading edge of the front fender. It’s a little bit annoying to bolt together but the bumper is flexible. You can shove some bolts into the front bumper, and then use nuts on the inside of the front fender. It’s much easier to do with the wheels off.
I am concerned, though, about the flexibility of the bumper. It will be interesting to see what happens at the high speeds that are encountered on Road Atlanta or Virginia International Raceway’s long straights. We were losing the integrated splitter off the old bumper, so perhaps we will have to tie the new splitter into the new bumper, or build some extra framework or support into the front bumper.
Time to do the rear bumper.