Hi Alan,
The Rally Im doing is the WRCs this had a different rear wing which can be seen in the pictures. One is the box art TAMIYA, the other is a real WRCs.
I have also included the real picture of the REPSOL with the same wing, but this did have a version with the whale tail.
With the road cars ESCORT COSWORTH, there was an option wing kit which removed the Whale tail and only had the boot spoiler. This actually gave approx. 5-10mph more than with the whale tail.....
I had the Whale Tail though....
CLICK TO ENLARGE PICTURES...