[GoatZillaRacing]

Originally Posted by "QUICK-SILVER"

Don't get/understand the .160" difference between max lift and coil bind.

Well aware there has to be some slack there. Just thinking .050"~.060" was the safe range. Like these heads should be good for another .100" lift or so.

May be off my rocker this AM
Clay

These are set up for hyd flat tappet and/or hyd roller applications. My guess is that .580 is the max lift because more would create excessive spring pressure on a flat tappet application. Should be good to .680 on a hyd roller.
Either way, you or I would set our springs up correctly for what ever cam we were running. Example. I'm putting roller springs on these very heads for a solid roller just to test.