I personally think there was a conspiracy between two guys sitting in an office having a little whiskey in their coffee one morning when one of them said to the other " you know what would be funny John" "whats that Bob?" "lets turn this 396 into a 402 and then badge it as a 400…….
then when the internet comes out we can sit back and laugh at all the enthusiasts who try to figure it out!!!!!
” “sounds good Bob…. Lets get to work”