Avant-Garde Technology was a small American custom-car marque operated as part of Grenit Corporation in Lancaster, New York. Led by founder/owner-designer Ken Kumiega, the firm hand-built a two-seat roadster that drew on early post-war sports-car styling while using modern engineering. The composite-body, rear-drive car was described as weighing about 2,600–2,700 lb and using a V8 rated near 420 hp with a 5-speed racing transmission, 4.56 rear…