Cylinder head dyno shoot out

It went into valve float at just past 5800, the cam was a custom grind, and had extremely aggressive lobes. I went back into the heads and lightend up the retainers, and worked on the geometry a bit more, but the short installed height was extremely difficult to get a spring that worked. It added rpm to the powerband, but it didn't get put back on the dyno, as the customer was in need of getting it in the car