so anyone have experience with the 320/533 hyd

Just the 320 duration spec tells me this cam has way to much duration for all but a very few builds. Duration at .050 is 272. Lobe center 104. It will probably come to life about 5,000 rpm, depending on the build. Being a hydraulic, it will also have a narrow power window due to the long duration and limited rpm up top. Sounds to me like a grind for a radical, low dollar bracket race motor.