sounds like youve got yourself a rare breed of car there mate.
most probs a gordon spooner motorsport version.

GSE had the rs2000 for develpments and the good old Stig was one of the main people who gave feed back on the car ready for its F2 homologated future
even though these cars were made in 91/92 they had the later face lift bodyshells which are 3cm wider.


if your gearbox looks anything like that one........ it is worth a fortune
heres a few pics of the cars in action.