Now it's time for some fun. The question is actually incorrect. There have been many discussions about how to define a big block, and bore spacing is the only reasonable one. This article from Wikipedia about the FE is very informative.
http://en.wikipedia.org/wiki/Ford_FE_engine
So we are actually comparing a MEDIUM block FE with a BIG block 385. I hope this does not cause any undue anxiety, for the FE is still a very nice engine, just not a big block.
