For which year(s) is the 410670 intake manifold and which motors? All I can tell from searching is that it is a two barrel iron intake, but that I can tell from looking at it. The car is from California originally, was that an intake used only on California cars?

 

According to Olds FAQ it's strictly a run of the mill 2bbl intake. There is nothing special about it.

https://oldspower.com/oldsfaq/ofinm.htm

 

Understood but that does not answer my question. Which year(s) and applications? This intake casting number is not referenced by year or motor in that FAQ. And not everything in that FAQ is 100% correct, had it bookmarked for years

 

410670 is 1972 350 only.