Gary Nelson told a tale on himself about the time when he and ol’ DW were winning a Championship together. It seems that he figured out a way to load several hundred pounds of buckshot into the roll cage of Darrell’s car, allowing it to “beat” the scales and pass prerace inspection.
Once Waltrip was on the track and doing pace laps, he had only to pull a hidden lever, which allowed the lead (And of course the weight) to be ejected from the car and roll harmlessly down the banking. The signal that this had been accomplished was Waltrip, keying his radio and yelling, “Bombs away!”
Needless to say, this much underweight car won more than its share of races.
NASCAR however, never managed to catch the pair at this particular trick. Nelson had cleverly located the exit spout exactly where the jack was positioned. When NASCAR inspectors raised the car with a jack, they concealed the evidence, and cleared the car to qualify and run. Yep, that one went more than a bit beyond “experimenting in the grey areas” and right on up to full-scale cheating, but it worked.
However the gig was up when one time some one washed the car with the buckshot in place. Seems they rusted and when Darrell opened the chute to let them go, they didn't exit at an appropriate time. Instead, they fell out directly in front of inspectors.