Is there very much difference in engine performace with a single plane intake vs. dual plane if you are running fuel injection, even a TBI unit? I'm trying to think of a difference with a single plane, and the only thing I can think of is the vacuum signal if you were running a carb., but if you were using a fuel injection system of some kind this would eliminate this problem? But I don't always think of everything and just wanted to get some other opinions.