I had the exact spacers you are talking about on my FJ. After much research and years of reading on the FJ / 4runner forums, I installed 5100's at 1.75" front with 5100 rears and 1.00" corned spacers when I got my 2014 4runner and this set up is much better. Ride is much better. Higher quality feel, etc. I'm an engineer (nit-picky) and a long time car/truck enthusiast and this is the way a would tell you to go. I will tell you that this set up is exactly level but when I tow my 6x12 enclosed cargo trailer, the front is too high / rear sags too much for my liking, even with Timbren extended bumps installed in the rear. The 4runner rear stock coils are soft. I am probably going to switch to 1.5 Daystar spacers or 1.5"-2.0" lift springs in the rear. If you tow, keep this in mind.