Looking for appraisal on possible prototype carbs

[Snnnn]

Hi all! I might be coming with some goodies today i just got a pair of dellorto dhla 40 R carbs from a possible prototype lancia delta hf gr.4 rally car. Now the question is am i way off or is this possible since ive heard they ran webers later but apparently a few rolled of the production line with dellortos since i am a total noob when it comes to dellortos or twin carbs in general with the little digging that i managed to do they all resulted in them being from a possible prototype production the carbs are stamped as follows 5370 A (195170401000) and 5369 P (195170401100). Now if these turn out to be this i just got an absolute killer price since they are in mint condition nothing missing except a single busted float thats gone bad. Id appreciate all the leads i can get from you smart people in here since i could totally be digging in the wrong direction here so thanks you in advance anything helps!