Jhieminga, you may be thinking of the
French Spitfire XIX which was rebuilt by Steve Hinton with a Shackleton Griffon 56 and contra prop unit as they were easier to come by than the normal Griffon 65, and also removed the torque problem which would have enabled Hinton to go after some brakes off to height records - had somebody else not got there first in a homebuilt!
Jacquard, the current owner, has now converted it back to a Griffon 65 this year and while it's a shame that an intriguing shape and sound has gone, the aeroplane is back as she should be.
Now... if the American owner of the airworthy Seafire 47 could be persuaded to bring it over here for a few weeks next year...
I love the sound Griffon makes - it does sound quite rough while throttled back, but at full snort that ripping snarl sounds fantastic! In the BoB film, you can distinctly hear the difference between one of the Merlin powered Spits and a Griffon during one of the scramble sequences.