Mark,
The only one I recall was the Volvo-engined car run in Thundersports by Richard Bolton / John Lowe in 1985, and run by Demon Tweeks in 86 for Richard Jenvey/Tony Hill.
There'a fairly poor quality photo that I took of the car in Birmingham Superprix qualifying on
http://racingsportscars.com/photo/Bi...25-photo.html.
Car is race no. 23