So I gotta ask, you're fixing this w/o insurance I assume? Most are pretty explicit now days about any sort of speed contests. Driving schools can still be the exception since there no timing and there are instructors, even though you are blowing around a track at 100mph.
As for the ding, well, as they say, that's racin'! And nobody today who earns a buck stomping the go pedal got there w/o wrinkling some sheet metal. So don't sweat it. Sucks but at least no one got hurt. Easier to replace truck parts than it is to replace people parts.