[Stefano]

Billy,
The Yenko Novas were mostly conversion cars. They were born with 396/375 engines. It is my understanding that all the Yenko Novas were not converted to L72 status.

I have never seen a COPO Nova and most of the Local folk lore pertaining to their existence seems to have come from Mr.Ed of Berganse and Fencil Tufo Chevrolet.

He did keep all his old sales records for both COPO and regular orders.(I haven't seen them, but that is what he says.) So if he ever makes them public or available we would be able to see if and how he COPO ordered 427 Novas?

I would think that if the "Father" of the L72 COPO cars, Don Yenko couldn't get GM to do it then it wasn't going to get done, IMO.