Swapping on an Airgap intake

It might be an interesting note to those of you that remember a previous thread of mine. I had trouble with the car laying over at 5K rpms. Well an interesting piece of evidence came to light while tearing it apart. I was running a carb spacer (one of the cheap adapter kind) to push the air cleaner up into the six pack scoop. Apparently it didn't match my intake very well as there was a huge gap on both sides of the primaries. This likely had a lot to do with why I couldn't get the idle down, thus forcing me to run less timing at idle (and consequently total timing). Plus it probably caused me to run super lean on the top end. The plugs always looked great (that and it only see's 5k at the track), I'm willing to bet this played a significant role in why the car hasn't been running as hard as it should.