lift @ the valve?
hydraulic cam...lifter could be bleeding down...causing the low lift number..
solid cam...gross lift minus lash....
and then there is the lousy pushrod angle...that you will lose lift on..
the lost will be cos 11 degrees x the amount of lift at the cam......that is what the pushrod angle will cost ya in lift at the valve.
http://www.forabodiesonly.com/mopar/showthread.php?t=199777&highlight=lift+valve