Rumblefish360 had a good point about part-throttle efficiency (post #19), which I never considered before. The darn dynos only measure full throttle performance. Only actual driving conditions will tell the tale.
1; And this is where people will tell you to use a slightly small carb (600 instead of a 750) for best throttle response and possible mileage gains since the smaller butterflies will have a higher velocity going past them to help atomize the fuel with the air.
It is a very small change at the butterfly but this is where the little things add up.
2: And this is where the broke, home grown, old school guys say, run a TQ. Or other spreadbore carb.