If you have a msd Hemi-6 chime in please

Peter at xv regularly with the comp cam's new springs and new cam run them on the dyno up to 7200 rpm--quite making power?? when my motor got dynoed they ran it up to 6400 and the engine was still making hp,There was no drop off and the power really came in around 3800 and my hp graph never dropped off--Steve