Welcome. A lot of Cross country/baja type trucks race IFS so if your big into beaches and dunes, you probably just need to beef up what you have. to fit 35's under your IFS though you will need more than just a b/l. You'll need some kind of suspension lift as well and probably some creative body work to the wheel wells also.
Some of these replies were a little harsh, but I have to agree about considering your driving habits.
Kev(alpine) -PM