Spoiler alert!

[Karnevil]

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).

Yeah I have some Alitaliya 1:18 models which do not have spoilers...............with lamp pods.
And then ones with pods and spoilers.
But all my Stradale models 1:18 Black,Blue,Red,Yellow,Lt Blue,Green all have spoilers and described as 1975 road versions,so im guessing by 1975 they would have been std fitment for homologation?

[ProtoTipo]

But all my Stradale models 1:18 Black,Blue,Red,Yellow,Lt Blue,Green all have spoilers and described as 1975 road versions,so im guessing by 1975 they would have been std fitment for homologation?

None of the Stradale production run were fitted with roof wings and spoilers at the time of manufacture.
There was an odd one that was trial fitted with the wing and rear spoiler. Curiously, these were colour coded.
As time went on, the unsold Stradale cars would have been fitted with grey metallic coloured roof wings and rear spoilers, before they were sold new.