Percent of lost lift due to 58 degree lifter angle?

I'm going to make an educated guess????
More lift = more loss at valve?
Yes

If you have ever had a 700 lift roller( I used to in my W5 motor) its pretty creepy watching the valve train rolling the motor over to check lash ... lol...... looks like no way it should stay together at an Rpm above what a tractor runs at
LOL that must be pretty crazy looking.