just random thoughts here...
this is the ST suspension 0.8 inch "spring distance kit" that I based my spacer off of.
coincidently ,the indent in the back of my spacer was 0.8 inch, so on both the ST and my spacers, the bump stop is in the same relative position. and would have the same travel (SVT struts on stock zx3 springs)
in total I have 6" total travel from full droop until the springs coil bind, but the bump stops should bottom out (compressing 2" down to 0.5") in 5.75"