novice question on my CAM
 

I recently had my LT1 repaired (383 stroked, stage 2 head port, CAM, etc). The CAM numbers my builder gave me are 290 @ .500, 230, 114 degree lob center, .480 lift. This is a Custom CAM. What do these numbers mean? Is there a good primer somewhere that describes what these numbers mean and what parameters in the PCM are affected by the new CAM?
Thanks.