I have a TF 2.5 BB. and 35s and have no problems my fenders ar chopped but zenons you would have no problems, but yes if you stay with the 4" coils definatly add the pitman arm. maybe even a flip kit

 

I agree that if you don't want a 4 inch lift, to get shorter coils. That much lift is just too much unless you're prepared to do it right. It sounds like whoever had the Jeep before you did not.
Get some 2.5 or 3" coils, loose the spacers and steering stabilizer, recenter your axles, recenter your steering wheel, add some front lower control arms, get a good alignment, rebalance the tires, then finally, when it's riding smooth, put the stabilizer back on.