William L. Porter, Designer of Classic American Cars, Dies at 93

As a senior designer at G.M., he helped create the exuberant, elongated shape of 1960s and ’70s cars like the Pontiac GTO, the Bonneville and the Trans Am.

​As a senior designer at G.M., he helped create the exuberant, elongated shape of 1960s and ’70s cars like the Pontiac GTO, the Bonneville and the Trans Am.