A couple of Mustangs have been powered by Griffons in the US for unlimited racing. So far as I know they all had the Griffon 57 out of a Shackleton driving a contra-rotating prop.
Steve Hinton - famously associated with the Red Baron Griffon-powered Mustang, a story in itself - has recently rebuilt a Spitfire PRXIX at Chino with a contra-rotating Griffon 57 - the reason being that, although it's not authentic, spares for the 57 are more plentiful than the correct 65; I think he also cited overhaul costs were cheaper! And, as he says, it looks different and sounds great!!! And nothing has been done that can't be undone...