I know this car from a few years ago. Not sure what has been done to it since my mate sold it.
Its competed on both Tarmac and forestry.
One thing for sure is that its had a paint job. It used to be black. From memory back then it had a small tank in the boot.
I'd ask for soem more details on what suspendion its running and engine spec.
Rallied a Sud for many years and they do make a good tarmac car although these days you are better competing in the up to 1400cc class as the 1600's are a lot more powerful, 200+ BHP. Also used it in the forests without any real problems.
Unless you have lots of money it will be difficult to get a good result anyway.
PM me if you want anything else I can remember.