Difference between lobe lift and pushrod lift

Ok,lok at it this way.My motor is a 440max wedge motor.I run 426 max wedge heads on my motor with a air flow rating of [email protected] cam is a .562 lift,but I do not get that at the valve,I lose through clearances and bending and geometry.my lobe lift is .375x1.5 for rocker ratio? if the rocker is truly 1.5,comes to .562.my valve clearance is .022&.024.I am down to .538.If any type of clearance or bending is in effect happening,I can lose .010 easly.I am down to.538.Now for my combo I also need to run a mixed set of max wedge rockers,of .485 offset intake,left and right,and a set of striaght rockers,and all of these are 1.6 ratio.If you apply the same situation as above,my lift now is .600 minus the .034 of lost lift,equals=.566 lift at the valve.A little rule of thumb,to get a true lift at the valve,and .050 lift to the cam.Mrmopartech