Horsepower limit for out of the box Edelbrock RPM heads

I believe that
cuz shifting at 7000, my engine was ~1600rpm past the power peak or more, so working on the falling side of the curve. When I shift it like that the power rises back up to peak power after the shift, cuz my splits are 78%. I wasn't there for low ET. Just there for one timeslip; the way I like to drive it; screaming.