The summer of 1963 saw Cadillac Studio presenting an early clay model of the '67 Eldorado to the Design Dome for review. At that time, the process of taking such models to the Design Dome was a customary procedure in the automotive industry, providing an opportunity for thorough evaluation and refinement. It is noted that certain programs, including the development of the '67 Eldorado, often necessitated extended durations before reaching the start of production, emphasizing the meticulousness and complexity involved in designing and engineering automobiles of that era.