My recommendation would be to remove the spacers and run just the OME springs, along with OME struts & shocks.
If you want to run four inches of lift on these trucks, either do it with two inches of suspension lift and two inches of body lift, or else get a complete lift kit that deals with all the complications that result from a four inch lift, if you plan on piecing it together yourself make sure you have the experience to do so.
As far as I'm aware no one offers a complete kit for an XL-7, although there are Grand Vitara kits that might be useable.
The problem you're experiencing is caused by excessive angle on the CV joints and you're going to end up breaking them, the fix is to drop the front differential down to reduce the angle, but that creates a different issue - as the control arms droop, they pull the wheels inwards, reducing the angle of the CV axles has the effect of moving the outer end outwards - so you have the wheels moving inwards and the outer end of the axle moving outwards - the problem is - the outer end of the CV is attached to the wheel, so now you're forcing the axle to telescope into itself - the inner CV joint allows some degree of movement (it's termed "plunge") to allow for the changes in axle length as the suspension cycles, but it can only permit so much movement - exceed that and the joint will break. The fix for that is a longer control arm that moves the lower end of the knuckle outwards and forwards - but how much outwards and forwards do you need it moved...
I've just touched the tip of the iceberg here, but I think (or I hope) I've given you enough that you can see what you're getting into - you want a supplier (and for that matter an installer) who has taken the time to put together a kit that addresses the issues, and will work with you to resolve whatever problems arise when you use their product as designed.
Please note that wording - I know for a fact that OME doesn't recommend spacers with their springs, and I'm pretty certain that the guys at Low Range Off Road don't market the combination of parts that you've installed for use together, so when you choose to combine them, you choose to be the "project design engineer" and you get to sort the issues out yourself.
One last thing - you don't need four inches of lift to clear 235/70R16 tires - I'm pretty certain it can be done with two and I suspect it can be done with no more lift than the OME springs alone will give you - I'm running 225/70s with no issues, and the only reason that's not 235/70s is they weren't available here when I was buying - save yourself the grief and expense and pull the spacers out.
