Can I run a 1" leveling spacer on top of the strut in addition to my Rancho suspension lift. It currently does not have any spacers there.

2010 FX4

 

2.5" max with leveling kits no matter how you combine them. Anything over that and it's fair game for the front end to start eating ball joints and tie rods.

If its a suspension kit with the drop down brackets and whatnot then you'll be fine.

 

Yes.

 

So with a 1-1/2 leveling with the RCX 6 inch lift should work?? Drop downs are only 5 inches!! Also going to be installing Bilstien struts for a 6 inch lift! Will this work without crazy A-arm angles??Thanks

 

So you want to add a leveling kit and the struts? Bad idea.

 

The Rancho is a full suspension lift, drop brackets, knuckles, sub frame, etc
This kit does not use a strut spacer to get the lift, so the 1" would be on top of the strut.