Dear Guys....I was looking through the GM resto page on the "net" and I see that they sell a huge number of decals for air cleaner and valve covers. There were a couple of horsepower designations that I couln't place. One was for 345 horsepower and the other 385. They are part #'s 3969861 and 3906658 respectively. ( I don't know if the numbers would be relevant to the era in which the engine was produced. ) Anyway, from the word Turbojet (both) and the first three digits of the code, I am speculating that they may have been in the 427 family. Can anyone tell me ( us ) what those great old engines were. Thanks R. B. PS I know the ZZZ is 385/385, but it's a new one.