Question on higher rpm gains

What did you actually see on the track with shifting at slightly higher rpm. I’m not talking over 7500 but say from 6800-7200rpm. I usually baby my stuff as it’s just a bracket car but we all know guys always like to go faster. I’m not much of a test and tuner as I’d rather take my one or two hits on race day and get out the shoe polish. But man this new 408 is really pulling at the 6800 rpm shift. With a roller cam and .650 lift she sure sounds nicer than my 422 with a .650 solid lifter cam and Indy heads. Please post up your findings.