I guess that you could call the Hurst/ Olds a COPO type car, except that the factory never claimed to put the motor in themselves. The story goes that the cars were delivered to Demmer Engineering to have the 400 pulled out, the 455 installed and all of the 'Hurst' stuff was done. This was done to keep the GM brass happy. Olds obeyed the 400 cu in limit for the 'A' bodies with this move. In reality, the 455 was placed in the chassis on the line at Lansing. I spoke with a couple of the guys that worked on the line in '68 and '69 and they said that the red motors in those 'A' body frames stood out like sore thumbs. (Right Dave!)
