well, that would work too, but isnt the lift calculated WITH the rocker ratio? so if the cam lobe has "lifted the lifter" by .050" then wouldn't the valve actually be .35"? (magnum motors have a 1:7 rocker ratio)

so for .050 lift you actually want .007 lift at the cam lobe.

and yes, it's true that cam manufacturers advertise different numbers for duration, but just about all of them list the actual duration from .050 to .050.

so my comp XE275HL, comp lists the intake duration at 275 degrees, but lists the @ .050 duration to be something like 235