Crane LA CCH-312-2 ????????

I found one of these cams w/ the lifters in my stuff. Tried looking it up, looks to be .528/.552 lift w .242/.252 duration @ 50. anyone know what this cam is saposed to be centerlined @? I am most likely interested in trading it for something a little smaller. .500-.525 lift area w little less duration. Thanks for any info on this beast of a cam.