Eddy float question

When I feel like having a little fun and start cruising in 1st around 3000-3500 rpm and floor it, it seems to take a sec before really picking up but if I'm cruising in 2nd or 3rd then drop it in 1st and floor it she screams with no hesitation. Why would it do this? My only guess would be the floats adjusted wrong and the bowls are running out of fuel when cruising at those rpms in 1st. What do you guys think it could be? My floats are adjusted as per edelbrocks recommendation. Thanks -kory