The exaust fits with the spare tire still under the truck. And I put the hitch on after the exaust. So everything should work for you. I had it done at a local shop and they didn't say anything about the tire. The spare is gone now, I have a fullsize (33) in the bed. I can get some pics tomorrow if you would like.
cool! i didn't think duals would fit with the spare tire in the way, not to mention a hitch too. The only way i could see running duals is to route the second pipe closest to the passenger side of the vehicle is come up over the axle clearing the shock absorber then clear the spare tire at the same time. Shoot me over some pics if you'd like. My truck is a 98 with the same engine only mine is a flareside reg cab. -Mike-