From all that I've read on static roll center....from approximately 3" above ground to at or slightly below ground. I've also read that the later is not preferable on early Z's. On my Z, with 1.5" shortened struts, coilovers, and with slightly less than 4" ground clearance at the front crossmember, I'm getting ready to relocate my LCA pivot point. The hopes are to minimize my bump steer....also, when I physically graphed where my static roll center will be with the LCA mod incorperated, I should be at around 3" above ground as opposed to the at ground position with the original LCA pivot locations. But for some basic useful information.....with your Z sitting normally, look at the position of your LCA's.....if they have a slight downward angle (lower point, nearest the wheel) or parrallel to the ground, you will likely be OK. You do not want an upward angle. In this instance you will not be getting the intended camber curve during bump (suspension compression). I'm no expert, but this is what I've learned from my research...hope it helps you to some degree.