i got ecsb 98 5.7 auto truck.i searched for this so please no smart replys.i got the torsion bars cranked for bigger tires and its a bit to stiff .and the old lady dont like it so im considering a rcx 6 inch lift with 35x12.50s.want bigger tires anyways.but im wondering about fuel mileage with them siZe of tires and changed gears.most my driving is city tho. .so the ones running 35s with about the same truck let me know how ur doing on gas