My new style 906x sagged 3/4"inch with zero added weight over a year(these should be less prone to sag than 890's) so I added 1.5" daystars and removed the coil bump stop to level me out, I expect the same results with the 890's or any rear coil over time(which raises the Q was the OEM coil bump left in place?). No hub to fender measurements, shock or coil part #'s so we can help you? The other concern is once you hit 23" hub to fender you run into cv boot rubing bellow issues, 24" and you start ripping boots unless brand new. Anything beyond 24" will be impossible to align in spec without adjustable uca. The height up front will change slightly if aligned, you want 0.02toe(0.04total), 0.0 to 0.2 camber, and 2.4 castor or more if you can get it outta the oem lca adjusters and pay the tech more under the table to get him to delve into it, these commonly seize causing more issues unless the tech points it out and cares what he does(this is extremely rare) usually they twist the oem static lower control arm bushing and it rides like crap and goes outta spec wearing tires shortly afterwards, so put in whiteline poly LCA bushings replace seized adjusters with oem and be done with it. And then you get into vibration issues from CV and driveshaft angle and possibly front diff needle bearing wear issue requiring a ECGS bronze oilite bushing replacement to try to sort it all out, so more info of your install is needed to offer any help that's related to your custom install, no crutial info no decently related help.