Acid dipping was pretty common in the Trans-Am, particularly by the factory teams. Dan Gurneys All American Racers team built both the factory Plymouth Cuda's which they'd be racing themselves, plus the Dodge Challengers that the Autodynamics team would race. Apparently the Challengers were left in the acid too long, and the shells became very weak, which was to affect them throughout the season, as the shells kept sagging.