I'm planning to add a 3" lift coil spring to my 2" spacer. I'll also have a 2" block in the back. This will give me 5" up front and 2" in the rear. I have 17x7.5 Fx4 wheels. I'm heavily considering the Nitto Trail Grappler M/T but do not know which size to get. Options are: 285/70r17, 285/75r17, 295/70r17, or just going big with 35x12.50r17. Thanks for your input and advice.

 

I don't think you can combine a 3 inch lifted coilspring with a 2 inch coilspring spacer. I may be wrong as my memory about lifting the 97-03 4x2's is fading. At the very least you will need longer aftermarket upper control arms. If you are gonna keep the OEM 7.5 inch wheels forever, a 285 or 295mm wide tire would be the best choice.