1965 273 intake Q?

Hi all...I have a 65 273 4 barrel intake manifold.....Casting number 2465726.
I think I have heard from different people that the intake bolt holes on the 65 manifold are different angles than the 66 and up....I dropped it on my 360 this afternoon....and I dont see the issue.....am I missing something? Is it a small difference? Thanks!!!:-D
Author: admin