I love the old 396/402, and 427 ci engines! I know everyone today seems to have a love affair with big cubic inch engines, whether they are SBC or BBC, but I like the way these old BBC engines perform. I also like that they are all internally balanced.
I really don't know why Chevy decided to up the 396 to a 402, but I'm guessing it simply sounded better to go over 400 ci displlacement. It definitely caused confusion, especially in trucks! At one time they had Chevy PU's with both the 400 sbc, and 402 bbc, and both carried the fender emblem of "400" on the outside.
I hope on my next hotrod build I will get a 454 base engine, and drop a 396/402/427 style crankshaft assembly in it to make it a 427.