I'm sure other people will chime and and tell you but your IFS is weak. Lots of speed and big tires will break stuff, even in stock form. IFS lifts have the ability of leaving the CV's at a bad angle. Go with a quailty 6" lift and call it good. 35's should really be your max. You can run 37's on your truck, use the money you saved from the 11" lift to buy parts you break running those tyres.
You can go soild front axle and still be able to spend a lot of money. check out www.industrialoffroad.com for some tips and links on a SAS.
You can go soild front axle and still be able to spend a lot of money. check out www.industrialoffroad.com for some tips and links on a SAS.