I'm with yotaboy79 on this one. I have an 89 extra cab, 4.88's 31" BFG MT's and all I did was put shackles in the rear and torshen the front up. My truck does really well on the trials, although I do need a locker for the rear. I've learned to pick a good line with the IFS. You will be better off learning to wheel with the stock 86 runner then doing the solid axle later.
