Small block LA Chryslers have one inherent flaw. The angle of the pushrod to the lifter to the rocker arm (3 compound angles) causes some lift loss. It is perfectly normal to see .020" lift loss with your cam size so IMO you did real good when you got .532" out of it. If the lifter, pushrod, and rocker arm ball were in perfect alignment you'd get the full amount of lift no problem.