AMC Rebel Machine
The Rebel Machine was a unique-looking muscle car, to say the least. The usual AMC V8 power plant was in place so there was no real improvement there. While AMC was going through a transitional phase, the Rebel Machine was one of the bright spots for the brand (via Hemmings).
It was not the most dominant muscle car on the market. Its questionable styling and reliability weren’t strong in the car’s favor. The sales numbers for the Rebel Machine were remarkably low, so the Rebel Machine didn’t have a long shelf life in the automotive industry as a result.