The last rally that the works cars didn't have the roof wing and rear spoiler (as far as I know) was the 1975 Swedish Rally. (early Alitalia colour scheme)
From the end of the 1974 season to the 1975 Swedish, the cars also had an early shape of 4 lamp pod with no cover. I'm guessing it was fabricated from aluminium.
The early 4 lamp pods are bit more 'sawtooth' shaped than the later and more common fibreglass 4 lamp pods.
I've just checked:
Pinto drove a works early Alitalia car to victory on the Rallye Sicily in March 1975.
That car still had no roof wing or rear spoiler, but the new 4 lamp pod.
ERC rounds aside, I think the first world championship round where the works cars had a roof wing and rear spoiler, would be the 1975 Safari (25th - 31st March).
Bookmarks