The aluminum body was built by Emil Deidt (formerly of Scarab, who came out of retirement for the job[2]) and Wayne Ewing, on an RCS chassis, with a 145 in (3,700 mm) wheelbase (as insisted on by Nancy).
[2] Handling was problematic; at Sandusky, Ohio, in July 1964, Wedge I flipped on its way through the timing lights, at a speed of over 200 mph (320 km/h).
[2] Wedge II was modified, with slots above the slicks to allow air trapped under the car to escape and rear suspension deleted,[2] while the wheelbase was also extended.
[1] Nancy powered the car with a selection of blown engines: a Plymouth, then a Chrysler hemi, and finally an Olds.
Wedge II was later stored, while Nancy purchased a more conventional slingshot car, and subsequently restored.