38´s and IFS pose no problem. We have a lot of trucks in Iceland running that combination. Toyota Hilux and LandCruisers, Izusu Troopers, Nissan Pathfinders. Some guys have even modified the 120 LC for 44" on IFS

I´ve had a Trooper on 38"s and even a Sidekick on 36"s and the IFS didn´t even notice the change