<VV> Carb numbering question

[Grant Young]

I have a customer in Poland who has a 1966 Corsa 140. He thinks is it original. The carbs on the engine are the 1965/early 1966 style without the secondary lockout system, and have an ID tag of 7025226. The 4th digit in the code usually identified the year between 1963 and 1966 (1967 was tagged the same as 66 and 68/9 are 7028xxx), so I am checking to see if there is a numbers wizard on our site that knows if GM carried the carbs over to 1966 with the same tags until they switched to the later design secondary carbs with the 7026xxx designation? Pictures have been sent to confirm that the carbs are the early design with the solid activating rods. An inquiring mind would like to know.
Thanks,
Grant