Decided to take some lift measurements at the valve ( see pic ). On the average, I am coming up about .040" short per valve as compared with the cam specs lift. Is this normal for a 59* stock small block? Solid lifter cam that visually looks good, as do the lifters. Couple of years running on the cam. All the valve train is in good shape. Running very light spring loads ( 110 - 315 ) so I don't see deflection as an issue. All measurements on all valves are within .010", so I don't have one way out of wack. . I accounted for valve clearance. Thoughts?