Percent of lost lift due to 58 degree lifter angle?

If you have some pushrod to lifter angles, or pushrod angles from vertical or horizontal, I can give you some numbers. I don't have an engine top open right now to measure them myself and just guessed in the example above.

The final number is a tad sensitive to the actual angles we are dealing with and since those pushrod angles are going to vary with different rockers and lift amounts, the angles at different lifts would be nice. Working with stock rocker up to .325" lifter lift might be one place to start for a generic number. I'd ideally work up a table of loss for .250", .325" and .400" lifter lift (to cover all common valve lifts) , using angle values taken at approximately .1" lift increments.

At the rocker, it is a whole 'nother story.