Hi Michael,
Don't know if you still have this Capri. It sounds very much like one I drove for Dunlop/HFR during the development of the Maxeret anti-lock braking system. Please e-mail Steve (my Son (currently typing this as I am not computer literate)) on
stevequintellect@outlook.com and He'll pass on my contact details for a chat.
Does the vehicle have a Matt black fibreglass bonnet held on by bonnet pins & 1600 badges on the wings?? - This was 42 years ago so may have changed a bit since then ;-)
Cheers,
John (typed by Steve)