Hello, I had a few questions, I have a 1991 ford bronco, 351 windsor 4x4. I was wondering if all of the smog equipment is absolutely necessary, I live in Kansas so no smog and to I have a hesitation. I let it warm up in the morning, 10 to 15 minutes before going to work. leaving the house no problem but when I slow down and start to speed up it bogs down or hesitates until i smash it to the floor then runs. I had to to the repair shop and they hooked the computer to it and said everything's running fine except that it has the original cat. I am in the process of redoing the exhaust and new high end plugs, wires cap and rotor and new coil. If you can help that would be great. thnx